Unpopular land developer Alex Jackson is shot to death on his privately owned island, so Humphrey and the team sail over to the island to solve the murder. The only people on the island at the time of the murder were Rosie, the housekeeper, Emily, th... (more)e secretary, and Alex's three children. The prime suspect was the only one who had access to the murder weapon, but also the only one with an alibi. Bad weather traps Humphrey and the team on the island with the killer. Only one of Alex's children were set to inherit his business, and when Humphrey learns that Alex was planning to change his will, he solves the case.