Night Mare Moon is not the only regret that Princess Celestia has. When the Mane Six begin to become plagued by nightmare it is up to Twilight, and her friends to solve the mystery. However, this journey will take beyond anywhere they have ever been before. But in order to so, Celestia must own up, and face her haunting past. Will they be able to stop the problem, or will they be forever tormented by their own subconscious.