". . . Petra's world is ending. Earth has been destroyed by a comet, and only a few hundred scientists and their children - among them Petra and her family - have been chosen to journey to a new planet . . . Hundreds of years later, Petra wakes to this new planet - and the discovery that she is the only person who remembers Earth. A sinister collective has taken over the ship during its journey, bent on erasing the sins of humanity's past . . ....