The best George Humbert’s mystery movies

Bob Randall, temporarily in command of the Coast Guard vessel Niobe, expects a promotion and the captaincy of his ship. Instead, he is replaced by Lieutenant Mays, son of the area commander. Mays is afflicted with a fear of the sea, although he has served well in Coast Guard aviation. His father, however, thinks Mays can overcome his fear by taking command of the Niobe. When seal poachers kidnap Bob Randall's girlfriend Connie, Bob and Mays disagree about the proper means of rescuing her and capturing the seal poachers. When Mays's inexperience and phobia foil their attempts at rescue, Bob comes up with his own plan.

After giving the District Attorney another stinging defeat, Perry plans to take a vacation in China. That is, he was, until Rhoda, his old flame, meets him at a restaurant. It seems that her husband Moxley, who had been allegedly dead for four years, is alive and demanding money as she has married into wealth. The case escalates when the police find the body of Moxley and charge her with the murder.

When the plane owned by the "Yukon and Columbia Mail Service" crashes, RCMP Sergeant Renfrew (James Newill) and Constable Kelly (Dave O'Brien) suspect murder. Their suspicions are confirmed when Renfrew finds the control stick has been jammed, forcing the plane to fly in one direction until the gas ran out. Mine owner Louise Howard (Louise Stanley) reports that her superintendent is missing. The Mounties find him murdered and that too has been made to look like an accident. A new mail service pilot, Bill Shipley (Warren Hull), arrives. He had gone to training school with Renfrew but had been cashiered for misconduct. The Mounties discover that Raymond (Karl Hackett), who had been working for Louise, really owns the flying line managed by Yuke Cardoe (William Pawley.) They find proof that all the gold from the mine isn't being turned over to Louise, and suspect that Raymond and Yuke are stealing the gold and shipping it to Seattle by plane.

A Japanese man claiming to be Mr. Moto, of the International Police, is abducted and murdered soon after disembarking from a ship at Port Said in Egypt. The real Mr. Moto is already in Port Said, investigating a conspiracy against the British and French governments.

Society matron Mrs. Livingston Baldwin Crane is selected as a juror in the trial of former chorus girl Yvette Gordon, who's accused of murdering her rich older husband. In court and during deliberations, Mrs. Crane proves to be a disruptive and unorthodox juror.

Street kids get sent to the country, where they get mixed up in murder and a haunted house.