The Twenty-Third Passenger

Five years ago, police agent Martin Schwartz's wife and son went missing while traveling on the cruise liner "Sultan of the Seas." At that time, the cruise company defended the version of suicide. However, Martin did not believe it. And now a passenger from that very liner calls him and claims that he must immediately come aboard the "Sultan of the Seas," as she has evidence that his wife did not jump into the sea of her own accord. Moreover, it is possible that his son is still alive, and strange things are happening on the liner. Leaving everything behind, Martin embarks on an unwanted journey, filled with determination to uncover the truth...