Passenger 23

Every year, on average 23 people disappear without a trace from cruise ships, presumed suicides or tragic accidents. \r\n\r\nNo one has ever come back. \r\n\r\nUntil now.\r\n\r\nFive years ago police psychologist Martin Schwartz lost his wife and son. They were holidaying on a cruise ship when they simply vanished. A lacklustre investigation was unable to shed any light on what happened - murder-suicide was the coroners verdict. It is a verdict that has haunted Martin ever since, blighting his life.\r\n\r\nBut now he has been contacted by an elderly woman, a writer, who claims to have information regarding their fate and wants him to come on board the Sultan of the Seas immediately.\r\n\r\nShe explains that his wife and son are not the only mother-and-child pair to have disappeared. Only a few months ago another mother and daughter also vanished. It appears there may be a serial killer on board.\r\n\r\nBut when the missing daughter reappears - carrying Martins sons beloved teddy bear - it becomes apparent that the truth could be much, much worse...