Sixteen-year-old Sera is the only survivor of an explosion on a plane. She wakes up in hospital to find that she has no memory. The only clue to her identity is a mysterious boy who claims she was part of a top-secret science experiment. The only adult she trusts insists that she shouldn't believe anything that anybody tells her. In a tense and pacy novel exploding with intrigue and action, Sera must work out who she is and where she came from. Eventually she will learn that the only thing worse than forgetting her past is remembering it.