diff --git a/app/controllers/tag_controller.rb b/app/controllers/tag_controller.rb
index 4855c384f7..0f1334417f 100644
--- a/app/controllers/tag_controller.rb
+++ b/app/controllers/tag_controller.rb
@@ -568,4 +568,8 @@ def fetch_counts
   end
 
   def topic_tree; end
+
+  def subtopics
+    Tag.find_by(name: params[:subtopic])
+    render "tags/subtopic", layout: false
 end
diff --git a/config/routes.rb b/config/routes.rb
index 88baa62445..c99e73bf5c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -383,6 +383,7 @@
   post 'comment/react/update/:id' => 'comment#react_update'
 
   get 'topic-tree' => 'tag#topic_tree'
+  get 'tags/:subtopic' => 'tag#subtopics'
 
   # Sample resource route (maps HTTP verbs to controller actions automatically):
   #   resources :products