When fifteen-year-old Luke Sheldon is offered a place at an American summer camp for smart kids, he thinks he's in for the trip of a lifetime. Surrounded by forests and built above a labyrinth of underground tunnels, there is more to Camp Hope than meets the eye. Are the rumours true that three campers disappeared a few years earlier? And why does camp leader Captain Budd refuse to talk about it? When Luke starts to find coded messages in his dorm he thinks it is a silly game - until one of his friends is attacked. Too late he discovers that he has been drawn into a horrific trap that could cost him his life . . .