Roo, considered by almost everyone to be a difficult boy, is haunted by nightmares of being left alone. After all, who wants a difficult boy around? His friends can't help - they have nightmares of their own.

To make matters worse, much much worse, Roo gets lost on an overnight ride, and crashes deep into a dark, densely-forested valley, where he is attacked by the terrifying creatures from their nightmares. They are real! This is their land. And Roo can't escape.

In a fast-paced and heartwarming adventure, Roo faces the worst fears imaginable, battling hard to fight, charm and trick his way through. But no human has ever gone in, or come out of this weird place.

There is no way out of Nightmare Valley.