There's bound to be something interesting during a cruise. Thomas Verov, a retired professor who now spends his days as a cruise lecturer, knows this from personal experience-great sights, new acquaintances, a taste of history, and an opportunity to get caught up in an international crime. On a cruise in the Baltic Sea, Thomas finds himself in the middle of an international drug ring involving the handsome cruise director, Tom, a middle-aged man with a secret penchant for male company in bed. Ann Crews, one of Thomas's new acquaintances, easily falls for Tom's charm and becomes an unwitting accomplice in his illegal trade, delivering suspicious parcels to Tom's friends during stopovers. Thomas, with the help of Ann's travel companion, Susan Stone, and a mysterious Mrs. Livingston, must try to catch Tom red-handed before it becomes too late for his new friend, Ann, who has become Tom's unrelenting and steadfast admirer.