After five years, Cherry still cannot forget the horror of the car crash that took her parents'''' lives. Something about that night had never made sense and haunted her dreams. She had tried to prove that she should have died along with her parents by embarking on every dangerous pursuit she could find. At twenty-six, she was running out of things to prove she was a vulnerable human. Booking herself and her best friend Sam on a river rafting adventure designed to make the most advanced adventurer panic. Cherry was confident this time she would prove she was either a human or something she had always suspected ... engineered to save her life.