"The action of the psychological detective "Passenger No. 23" takes place on the high seas - a place that seems to be created for the perfect crime. The wife and son of the detective Martin Schwartz went on a cruise on a liner and disappeared. Five years later an unknown woman, a passenger on the same ship, reports that she knows something about his son, who may have survived. Martin goes on a trip as an undercover agent and learns that cruise ships disappear every year

twenty three people. And among them is a little girl who disappeared on the same liner and reappeared. With his son's toy in his hands...

For fans of quality detective stories with unpredictable endings."..