Max is haunted by a girl with green eyes. He ignores the odd visions, but then he meets the girl face to face. Her name is Julia, and she and Max knew each other once, in another world...and now she needs his help. The borders between realities are thinning, and Alastair Hammond's experiments into the existence of parallel universes are dangerous and destructive. Marooned within a bewildering series of alternate timelines, Max and Julia are forced to fight for their own survival and to save the very fabric of reality from Hammond's deadly scheme.