While steaming from Honolulu to Los Angeles the owner of a prize racehorse headed for the Santa Anita Handicap is killed, apparently kicked to death by his stallion. Not so, deduces Charlie. Later he exposes efforts to fix a race at the famous track.

A group of stable hands is given a race horse when its owner retires from the business. (The group is played by the "Original Sing Band," which uses their mouths to sound like musical instruments.) They raise money to run the horse in the Hollywood Derby at Santa Anita race track. Many Hollywood personalities attend the event.

Charlie impersonates an employee of the U.S. government to foil an espionage plot which would destroy part of the Panama Canal, trapping a Navy fleet on its way to the Pacific after maneuvers in the Atlantic.

Mary Whitman因为婚姻生活步如意，被逼要离婚。她到美国一个叫雷诺的地方申请离婚手续。但是，当她进入酒店要遇她的律师时（专门负责离婚手续的律师），且发现这名律师被谋杀！而她却无辜的成为谋杀凶手。在酒店里有许多各式各样的人存在，而每个人都好像有嫌疑想要这名律师死。我们只好邀请著名的陈查理为我们解决谋杀案。

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A wax museum run by a demented doctor contains statues of such crime figures as Jack the Ripper and Bluebeard. In addition to making wax statues the doctor performs plastic surgery. It is here that an arch fiend takes refuge.

陈查理一个小说家朋友突然"自杀"了..在旧金山海湾的珍宝岛举行的国际展会上陈查理拿出他的十二宫图，指出那个欲盖 弥彰的绑匪其实就是那个杀人犯..