Passenger 23Passenger 23

Five years ago police psychologist Martin Schwartz lost his wife and son. They were holidaying on a cruise ship when they simply vanished, the case written off as a straightforward murder-suicide. They are not the only parent-and-child pair to have disappeared from this ship in recent years and yet, the authorities seem unconcerned. But when a missing girl reappears carrying Martin's son's beloved teddy bear the police won't be able to avoid the truth that something sinister is lurking on board.