diff --git a/scripts/data/database.js b/scripts/data/database.js
index 20af851..fb63a60 100644
--- a/scripts/data/database.js
+++ b/scripts/data/database.js
@@ -1,5 +1,6 @@
 import { objectiveState } from "../helpers/constants.js";
 import { Settings } from "../helpers/settings.js";
+import { newId } from "../helpers/constants.js";
 
 export class QuestDatabase extends Collection {
     static #quests;
@@ -7,17 +8,25 @@ export class QuestDatabase extends Collection {
         // Collect all quests.
         let q = this.#quests.map((q) => {
             // Get all of the objectives with index.
-            let objs = q.objectives.map((o, i) => {
-                return {
-                    ...o,
-                    index: i,
-                };
-            });
+            let objs = q.objectives.map((o, i) =>
+                QuestDatabase.nestedObjectives(o, i, 0)
+            );
 
             // If the user is not a GM, completely remove
             // all secret objectives from the list.
             if (!game.user.isGM) {
                 objs = objs.filter((o) => !o.secret);
+                function filterObjectives(arr) {
+                    return arr.filter((o) => {
+                        // If the current object is a secret, filter it out.
+                        if (o.secret) return false;
+
+                        // If the object is not a secret, check each sub objective.
+                        if (o.subs) o.subs = filterObjectives(o.subs);
+                        return true;
+                    });
+                }
+                filterObjectives(objs);
 
                 // If the view mode is next only, strip extra objectives
                 if (q.viewStyle === "next") {
@@ -104,7 +113,7 @@ export class QuestDatabase extends Collection {
         let index = -1;
         do {
             // Create a new id
-            data.id = "id" + Math.random().toString(16).slice(2);
+            data.id = QuestDatabase.newId();
 
             // Try to find any quests with the id
             // index will be -1 if none were found.
@@ -140,6 +149,28 @@ export class QuestDatabase extends Collection {
 
     static refresh() {
         this.#quests = Settings.get(Settings.NAMES.QUEST_DB).quests;
+
+        // Verify that all quest objectives have an id
+        this.#quests.forEach((q, i) => {
+            this.#quests[i] = {
+                ...q,
+                objectives: q.objectives.map((o) =>
+                    QuestDatabase.nestedObjectives(o, 0)
+                ),
+            };
+        });
+    }
+
+    static nestedObjectives(objective) {
+        return {
+            ...objective,
+            id: objective.id || newId(),
+            subs: objective.subs
+                ? objective.subs.map((o) => QuestDatabase.nestedObjectives(o))
+                : null,
+        };
+        // Append the index to the objective
+        // Iterate through the nested objects
         console.log("Loaded " + this.#quests.length + " quests.");
     }
 }
diff --git a/scripts/data/objective.js b/scripts/data/objective.js
index c4615ab..9152682 100644
--- a/scripts/data/objective.js
+++ b/scripts/data/objective.js
@@ -1,4 +1,4 @@
-import { objectiveState } from "../helpers/constants.js";
+import { newId, objectiveState } from "../helpers/constants.js";
 
 export class Objective {
     constructor(data = {}) {
@@ -14,32 +14,36 @@ export class Objective {
 
         // Prepare the basic data.
         let data = {
+            id: newId(),
             text: "",
             secret: false,
             state: objectiveState.INCOMPLETE,
+            sublevel: 0,
+            subs: [],
         };
 
         // Check for headers.
         while (
             str.startsWith("-") ||
             str.startsWith("+") ||
-            str.startsWith("/")
+            str.startsWith("/") ||
+            str.startsWith("*")
         ) {
             // Check for State flag
             if (str.startsWith("-")) {
                 data.state = objectiveState.FAILED;
-                str = str.substring(1);
             } else if (str.startsWith("+")) {
                 data.state = objectiveState.COMPLETE;
-                str = str.substring(1);
             } else if (str.startsWith("/")) {
                 // Mark as secret
                 data.secret = true;
-                str = str.substring(1);
+            } else if (str.startsWith("*")) {
+                data.sublevel++;
             }
 
             // Trim any whitespace that may be created.
             // This is to fix lines like "+ Objective"
+            str = str.substring(1);
             str = str.trim();
         }
 
@@ -66,8 +70,27 @@ export class Objective {
             // Try to parse the line.
             let o = Objective.parse(l);
 
-            // Skip any lines that failed to parse.
-            if (o) result.push(o);
+            // If the line fails to parse then skip it.
+            if (!o) return;
+
+            // If there are no sublevels, the objective is not a subobjective
+            if (!o.sublevel) {
+                result.push(o);
+                return;
+            }
+
+            // If the sublevel is greater than zero
+            // Get the last item.
+            let parent = result[result.length - 1];
+
+            // For each sub level, move a layer deeper
+            for (let i = 1; i < o.sublevel; i++) {
+                // While there are more sublevels, iterate through the subobjectives
+                parent = parent.subs[parent.subs.length - 1];
+            }
+
+            // Parent should now be the parent of the current objective.
+            parent.subs.push(o);
         });
 
         // Return the list of objectives.
@@ -75,8 +98,45 @@ export class Objective {
     }
 
     loadData(data = {}) {
+        this.id = data.id || newId();
         this.text = data.text || "";
         this.secret = data.secret || false;
         this.state = data.state || objectiveState.INCOMPLETE;
+        this.sublevel = data.sublevel || 0;
+        this.subs = data.subs || [];
+    }
+
+    static stringify(objective) {
+        let line = "";
+        // First, start by marking the quest as complete or failed if necessary.
+        if (objective.state === objectiveState.COMPLETE) line += "+";
+        else if (objective.state === objectiveState.FAILED) line += "-";
+
+        // Mark the quest as a secret if needed.
+        if (objective.secret) line += "/";
+
+        // Add any subquest indentation
+        line += "*".repeat(objective.sublevel);
+
+        // Add the text.
+        line += objective.text;
+
+        // For each subobjective
+        // stringify the subobjective
+        // Add it to the line as a new line
+        if (objective.subs)
+            objective.subs.forEach((sub) => {
+                line += "\n" + Objective.stringify(sub);
+            });
+
+        // Push the completed line to the stack.
+        return line;
+    }
+
+    static getNextState(state) {
+        if (state === objectiveState.INCOMPLETE) return objectiveState.COMPLETE;
+        else if (state === objectiveState.COMPLETE)
+            return objectiveState.FAILED;
+        else return objectiveState.INCOMPLETE;
     }
 }
diff --git a/scripts/data/quest.js b/scripts/data/quest.js
index 593fce2..f070315 100644
--- a/scripts/data/quest.js
+++ b/scripts/data/quest.js
@@ -24,4 +24,12 @@ export class Quest {
             });
         }
     }
+
+    static stringify(quest) {
+        let strings = [];
+        quest.objectives.forEach((o) => {
+            strings.push(Objective.stringify(o));
+        });
+        return strings.join("\n");
+    }
 }
diff --git a/scripts/helpers/constants.js b/scripts/helpers/constants.js
index efb9586..1de8c04 100644
--- a/scripts/helpers/constants.js
+++ b/scripts/helpers/constants.js
@@ -18,3 +18,7 @@ export const questViewStyle = Object.freeze({
     VIEW_NEXT: 1,
     VIEW_COMPLETE: 2,
 });
+
+export function newId() {
+    return "id" + Math.random().toString(16).slice(2);
+}
diff --git a/scripts/helpers/handlebars.js b/scripts/helpers/handlebars.js
index 4e3d6fa..ee3ff5b 100644
--- a/scripts/helpers/handlebars.js
+++ b/scripts/helpers/handlebars.js
@@ -12,8 +12,14 @@ export class HandlebarHelper {
             return o1 === o2;
         });
 
+        Handlebars.registerHelper("simplerQuestsLastObjective", (list, id) => {
+            return list[list.length - 1].id === id;
+        });
+
         await loadTemplates({
             trackerBody: "modules/simpler-quests/templates/tracker-body.hbs",
+            trackerObjective:
+                "modules/simpler-quests/templates/tracker-objective.hbs",
         });
     }
 }
diff --git a/scripts/ui/questeditor.js b/scripts/ui/questeditor.js
index 7a6628e..38978a0 100644
--- a/scripts/ui/questeditor.js
+++ b/scripts/ui/questeditor.js
@@ -99,30 +99,6 @@ export class QuestEditor extends Application {
     }
 
     async getData(options = {}) {
-        // Create an empty collection of strings.
-        // This is to convert the objectives back into
-        // a text body for the user to interact with.
-        let strings = [];
-
-        // Iterate through each objective to convert individual
-        // objectives into lines.
-        this.quest.objectives.forEach((o) => {
-            let line = "";
-            // First, start by marking the quest as complete or failed if necessary.
-            if (o.state === objectiveState.COMPLETE) line += "+";
-            else if (o.state === objectiveState.FAILED) line += "-";
-
-            // Mark the quest as a secret if needed.
-            if (o.secret) line += "/";
-            line += o.text;
-
-            // Push the completed line to the stack.
-            strings.push(line);
-        });
-
-        // Create the final text for the user to interact with.
-        const objectiveString = strings.join("\n");
-
         const viewStyle =
             this.quest.viewStyle ||
             Settings.get(Settings.NAMES.QUEST_VIEW_STYLE);
@@ -130,7 +106,7 @@ export class QuestEditor extends Application {
         return foundry.utils.mergeObject(super.getData(), {
             title: "Quest Editor Test",
             questTitle: this.quest.title,
-            objectives: objectiveString,
+            objectives: Quest.stringify(this.quest),
             visible: this.quest.visible,
             viewStyle: viewStyle,
             viewStyleHint: this.#viewStyles[viewStyle],
diff --git a/scripts/ui/questtracker.js b/scripts/ui/questtracker.js
index 1d2039f..9761e93 100644
--- a/scripts/ui/questtracker.js
+++ b/scripts/ui/questtracker.js
@@ -3,6 +3,7 @@ import { QuestDatabase } from "../data/database.js";
 import { QuestEditor } from "./questeditor.js";
 import { objectiveState } from "../helpers/constants.js";
 import { Settings } from "../helpers/settings.js";
+import { Objective } from "../data/objective.js";
 
 export class QuestTracker extends Application {
     #collapsed;
@@ -154,10 +155,12 @@ export class QuestTracker extends Application {
             // Get the quest and objective ID
             const questId =
                 evt.target.closest("[data-quest-id]").dataset.questId;
-            const objIndex = evt.target.dataset.index;
+
+            // Get the objective index
+            const objId = evt.target.dataset.id;
 
             // Get the index of the quest objective.
-            if (!questId || objIndex === undefined) return;
+            if (!questId || objId === undefined) return;
 
             // Get the quest.
             let quest = QuestDatabase.getQuest(questId);
@@ -165,22 +168,24 @@ export class QuestTracker extends Application {
             // Ensure the quest is a valid object.
             if (!quest) return;
 
-            // Progress the quest to the next state. Progression is cyclical.
-            if (quest.objectives.length > objIndex) {
-                if (
-                    quest.objectives[objIndex].state ===
-                    objectiveState.INCOMPLETE
-                )
-                    quest.objectives[objIndex].state = objectiveState.COMPLETE;
-                else if (
-                    quest.objectives[objIndex].state === objectiveState.COMPLETE
-                )
-                    quest.objectives[objIndex].state = objectiveState.FAILED;
-                else
-                    quest.objectives[objIndex].state =
-                        objectiveState.INCOMPLETE;
+            // This function will be used to recursively search for and update
+            // the selected quest objective.
+            function findAndUpdateState(obj, id) {
+                // If the current objective is the correct one, update it.
+                if (obj.id === id) {
+                    obj.state = Objective.getNextState(obj.state);
+                } else if (obj.subs) {
+                    // Iterate through subobjectives and attempt to update.
+                    obj.subs.forEach((o) => {
+                        findAndUpdateState(o, id);
+                    });
+                }
             }
 
+            quest.objectives.forEach((o) => {
+                findAndUpdateState(o, objId);
+            });
+
             // Update the quest and save.
             QuestDatabase.update(quest);
             QuestDatabase.save();
@@ -194,17 +199,31 @@ export class QuestTracker extends Application {
             // Get the quest and objective ID
             const questId =
                 evt.target.closest("[data-quest-id]").dataset.questId;
-            const objIndex = evt.target.dataset.index;
+            const objId = evt.target.dataset.id;
 
             // If either ID is invalid, abort.
-            if (!questId || objIndex === undefined) return;
+            if (!questId || objId === undefined) return;
 
             // Get the quest
             let quest = QuestDatabase.getQuest(questId);
 
-            // Update the objective's secret status.
-            quest.objectives[objIndex].secret =
-                !quest.objectives[objIndex].secret;
+            // This function will be used to recursively search for and update
+            // the selected quest objective.
+            function findAndUpdateSecret(obj, id) {
+                // If the current objective is the correct one, update it.
+                if (obj.id === id) {
+                    obj.secret = !obj.secret;
+                } else if (obj.subs) {
+                    // Iterate through subobjectives and attempt to update.
+                    obj.subs.forEach((o) => {
+                        findAndUpdateSecret(o, id);
+                    });
+                }
+            }
+
+            quest.objectives.forEach((o) => {
+                findAndUpdateSecret(o, objId);
+            });
 
             // Update the database and save.
             QuestDatabase.update(quest);
diff --git a/styles/tracker.css b/styles/tracker.css
index cfaca3c..8104779 100644
--- a/styles/tracker.css
+++ b/styles/tracker.css
@@ -1,4 +1,5 @@
 .tracker {
+    --dark-rail: var(--dark-text);
     display: flex;
     flex-direction: column;
     gap: 5px;
@@ -88,19 +89,50 @@
 }
 
 .simpler-quest-objective {
+    color: var(--dark-text);
     margin-left: 1rem;
     font-size: 0.9rem;
 }
 
+.subobjective {
+    position: relative;
+}
+
+.subobjective > .border-left {
+    position: absolute;
+    top: 0;
+    left: 0.4rem;
+    height: 0.5rem;
+    width: 0.5rem;
+}
+.subobjective > .border-down {
+    position: absolute;
+    top: 0.5rem;
+    left: 0.4rem;
+    bottom: 0;
+    width: 0.5rem;
+}
+
 .simpler-quest-objective.complete {
-    opacity: 0.5;
     text-decoration: line-through;
 }
 
 .simpler-quest-objective.failed {
+    --dark-rail: var(--dark-failed);
+    --dark-text: var(--dark-failed);
     color: var(--dark-failed);
 }
 
 .simpler-quest-objective.secret {
+    --dark-rail: var(--dark-secret);
     color: var(--dark-secret);
 }
+
+.subobjective > .border-left {
+    border-left: 1px solid var(--dark-rail);
+    border-bottom: 1px solid var(--dark-rail);
+}
+
+.subobjective > .border-down {
+    border-left: 1px solid var(--dark-rail);
+}
diff --git a/templates/tracker-body.hbs b/templates/tracker-body.hbs
index 78e1cbb..805271d 100644
--- a/templates/tracker-body.hbs
+++ b/templates/tracker-body.hbs
@@ -17,17 +17,7 @@
             </div>
             {{#if (simplerQuestIsActiveQuest ../activeQuests this.id)}}
                 {{#each this.objectives}}
-                    <div class="simpler-quest-objective{{#unless (simplerQuestsEquals this.state 0)}} complete{{/unless}}{{#if (simplerQuestsEquals this.state -1)}} failed{{/if}}{{#if this.secret}} secret{{/if}}"
-                        data-index="{{this.index}}">
-                        {{#if (simplerQuestsEquals this.state 1)}}
-                            <i class="fa-regular fa-square-check" title="{{localize 'SimplerQuests.Tracker.Complete'}}"></i>
-                        {{else if (simplerQuestsEquals this.state -1)}}
-                            <i class="fa-solid fa-square-xmark" title="{{localize 'SimplerQuests.Tracker.Failed'}}"></i>
-                        {{else}}
-                            <i class="fa-regular fa-square" title="{{localize 'SimplerQuests.Tracker.Incomplete'}}"></i>
-                        {{/if}}
-                        {{this.text}}
-                    </div>
+                    {{> trackerObjective}}
                 {{/each}}
             {{/if}}
         </div>
diff --git a/templates/tracker-objective.hbs b/templates/tracker-objective.hbs
new file mode 100644
index 0000000..98ff447
--- /dev/null
+++ b/templates/tracker-objective.hbs
@@ -0,0 +1,23 @@
+
+<div class="simpler-quest-objective{{#unless (simplerQuestsEquals this.state 0)}} complete{{/unless}}{{#if (simplerQuestsEquals this.state -1)}} failed{{/if}}{{#if this.secret}} secret{{/if}}"
+    data-id="{{this.id}}">
+    {{#if (simplerQuestsEquals this.state 1)}}
+        <i class="fa-regular fa-square-check" title="{{localize 'SimplerQuests.Tracker.Complete'}}"></i>
+    {{else if (simplerQuestsEquals this.state -1)}}
+        <i class="fa-solid fa-square-xmark" title="{{localize 'SimplerQuests.Tracker.Failed'}}"></i>
+    {{else}}
+        <i class="fa-regular fa-square" title="{{localize 'SimplerQuests.Tracker.Incomplete'}}"></i>
+    {{/if}}
+    {{this.text}}
+    {{#if this.subs}}
+        <div class="subobjectives">
+            {{#each this.subs}}
+                <div class="subobjective">
+                    <div class="border-left"></div>
+                    {{#unless (simplerQuestsLastObjective ../subs this.id)}}<div class="border-down"></div>{{/unless}}
+                    {{> trackerObjective}}
+                </div>
+            {{/each}}
+        </div>
+    {{/if}}
+</div>
\ No newline at end of file