In the strange labyrinth of pipes on the planet called Dark, things are falling apart. Dun doesn't want to be a hero, he just wants to find an answer to the terrifying dreams he's been having. But the answers, the real answers, are going to take him places he's never imagined and tear him from the only home he's ever known.
With a half-finished map from his missing father, an old friend, a new friend, and the mysterious Myrch to guide him, he journeys through parts of his world he's never imagined. Are his dreams real foretellings? Who can he trust to be who they say there are? What are the strange forces that seem to be literally pulling their world apart?
As he travels through a world that is much bigger than he thought it was, what he won't know will kill him. And everyone he knows.