diff --git a/learning/tour-of-beam/frontend/lib/models/group.dart b/learning/tour-of-beam/frontend/lib/models/group.dart
index 22086e6303e8..ba1d4047a574 100644
--- a/learning/tour-of-beam/frontend/lib/models/group.dart
+++ b/learning/tour-of-beam/frontend/lib/models/group.dart
@@ -23,15 +23,28 @@ import 'parent_node.dart';
 class GroupModel extends ParentNodeModel {
   const GroupModel({
     required super.id,
-    required super.title,
     required super.nodes,
+    required super.parent,
+    required super.title,
   });
 
-  GroupModel.fromResponse(GroupResponseModel group)
-      : super(
-          id: group.id,
-          title: group.title,
-          nodes:
-              group.nodes.map(NodeModel.fromResponse).toList(growable: false),
-        );
+  factory GroupModel.fromResponse(
+    GroupResponseModel groupResponse,
+    ParentNodeModel parent,
+  ) {
+    final group = GroupModel(
+      id: groupResponse.id,
+      nodes: [],
+      parent: parent,
+      title: groupResponse.title,
+    );
+
+    group.nodes.addAll(
+      groupResponse.nodes.map<NodeModel>(
+        (node) => NodeModel.fromResponse(node, group),
+      ),
+    );
+
+    return group;
+  }
 }
diff --git a/learning/tour-of-beam/frontend/lib/models/module.dart b/learning/tour-of-beam/frontend/lib/models/module.dart
index 81f8c1b6d613..eb1f7e50633c 100644
--- a/learning/tour-of-beam/frontend/lib/models/module.dart
+++ b/learning/tour-of-beam/frontend/lib/models/module.dart
@@ -27,18 +27,27 @@ class ModuleModel extends ParentNodeModel {
 
   const ModuleModel({
     required super.id,
-    required super.title,
     required super.nodes,
+    required super.parent,
+    required super.title,
     required this.complexity,
   });
 
-  ModuleModel.fromResponse(ModuleResponseModel module)
-      : complexity = module.complexity,
-        super(
-          id: module.id,
-          title: module.title,
-          nodes: module.nodes
-              .map<NodeModel>(NodeModel.fromResponse)
-              .toList(growable: false),
-        );
+  factory ModuleModel.fromResponse(ModuleResponseModel moduleResponse) {
+    final module = ModuleModel(
+      complexity: moduleResponse.complexity,
+      nodes: [],
+      id: moduleResponse.id,
+      parent: null,
+      title: moduleResponse.title,
+    );
+
+    module.nodes.addAll(
+      moduleResponse.nodes.map<NodeModel>(
+        (node) => NodeModel.fromResponse(node, module),
+      ),
+    );
+
+    return module;
+  }
 }
diff --git a/learning/tour-of-beam/frontend/lib/models/node.dart b/learning/tour-of-beam/frontend/lib/models/node.dart
index d13ceea2d282..df58667a48c8 100644
--- a/learning/tour-of-beam/frontend/lib/models/node.dart
+++ b/learning/tour-of-beam/frontend/lib/models/node.dart
@@ -19,15 +19,18 @@
 import '../repositories/models/node.dart';
 import '../repositories/models/node_type_enum.dart';
 import 'group.dart';
+import 'parent_node.dart';
 import 'unit.dart';
 
 abstract class NodeModel {
   final String id;
   final String title;
+  final NodeModel? parent;
 
   const NodeModel({
     required this.id,
     required this.title,
+    required this.parent,
   });
 
   /// Constructs nodes from the response data.
@@ -36,20 +39,23 @@ abstract class NodeModel {
   /// because they come from a golang backend which does not
   /// support inheritance, and so they use an extra layer of composition
   /// which is inconvenient in Flutter.
-  static List<NodeModel> fromMaps(List json) {
+  static List<NodeModel> fromMaps(List json, ParentNodeModel parent) {
     return json
         .cast<Map<String, dynamic>>()
         .map<NodeResponseModel>(NodeResponseModel.fromJson)
-        .map(fromResponse)
+        .map((nodeResponse) => fromResponse(nodeResponse, parent))
         .toList();
   }
 
-  static NodeModel fromResponse(NodeResponseModel node) {
+  static NodeModel fromResponse(
+    NodeResponseModel node,
+    ParentNodeModel parent,
+  ) {
     switch (node.type) {
       case NodeType.group:
-        return GroupModel.fromResponse(node.group!);
+        return GroupModel.fromResponse(node.group!, parent);
       case NodeType.unit:
-        return UnitModel.fromResponse(node.unit!);
+        return UnitModel.fromResponse(node.unit!, parent);
     }
   }
 }
diff --git a/learning/tour-of-beam/frontend/lib/models/parent_node.dart b/learning/tour-of-beam/frontend/lib/models/parent_node.dart
index 0271cfb9508f..d7ec71bd1886 100644
--- a/learning/tour-of-beam/frontend/lib/models/parent_node.dart
+++ b/learning/tour-of-beam/frontend/lib/models/parent_node.dart
@@ -23,6 +23,7 @@ abstract class ParentNodeModel extends NodeModel {
 
   const ParentNodeModel({
     required super.id,
+    required super.parent,
     required super.title,
     required this.nodes,
   });
diff --git a/learning/tour-of-beam/frontend/lib/models/unit.dart b/learning/tour-of-beam/frontend/lib/models/unit.dart
index 48b55af33d15..52b34072953e 100644
--- a/learning/tour-of-beam/frontend/lib/models/unit.dart
+++ b/learning/tour-of-beam/frontend/lib/models/unit.dart
@@ -18,8 +18,13 @@
 
 import '../repositories/models/unit.dart';
 import 'node.dart';
+import 'parent_node.dart';
 
 class UnitModel extends NodeModel {
-  UnitModel.fromResponse(UnitResponseModel unit)
-      : super(id: unit.id, title: unit.title);
+  UnitModel.fromResponse(UnitResponseModel unit, ParentNodeModel parent)
+      : super(
+          id: unit.id,
+          parent: parent,
+          title: unit.title,
+        );
 }
diff --git a/learning/tour-of-beam/frontend/lib/pages/tour/controllers/content_tree.dart b/learning/tour-of-beam/frontend/lib/pages/tour/controllers/content_tree.dart
index dc5fc5a15ceb..9952cbbaecdb 100644
--- a/learning/tour-of-beam/frontend/lib/pages/tour/controllers/content_tree.dart
+++ b/learning/tour-of-beam/frontend/lib/pages/tour/controllers/content_tree.dart
@@ -43,7 +43,16 @@ class ContentTreeController extends ChangeNotifier {
     }
 
     _currentNode = node;
-    // TODO(alexeyinkin): Set _treeIds from node.
+    _treeIds = _getNodeAncestors(node, [node.id]);
     notifyListeners();
   }
+
+  List<String> _getNodeAncestors(NodeModel node, List<String> ancestors) {
+    if (node.parent != null) {
+      ancestors.add(node.parent!.id);
+      return _getNodeAncestors(node.parent!, ancestors);
+    } else {
+      return ancestors.reversed.toList();
+    }
+  }
 }
diff --git a/learning/tour-of-beam/frontend/lib/pages/tour/state.dart b/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
index ae8fc0e1e706..e4a0c4df2243 100644
--- a/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
+++ b/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
@@ -53,6 +53,7 @@ class TourNotifier extends ChangeNotifier with PageStateMixin<void> {
       );
 
   void _onChanged() {
+    emitPathChanged();
     final currentNode = contentTreeController.currentNode;
     if (currentNode is UnitModel) {
       final content = _unitContentCache.getUnitContent(