Not much is known about the storyline yet.

In HTD Day 2, Sam stated "the single player story will be focused on who you picked as your Main Character. The main story of the game will be the same for everybody but each class will have a different point of view of the story." and "every class in the game is in search of something special. They are searching for a powerful secret technique that has been lost for centuries." However, the initial plans for the story may long since have changed. The first level is currently being created.