A hilarious comedy. Four thieves are planning a diamond theft. The members are Ken (Michael Palin), who has a stutter, George (Tom Georgeson), George's girlfriend Wanda (Jamie Lee Curtis) - Ken happens to call his favorite fish "Wanda", and Otto (Kevin Kline). Despite the minor incidents during the theft, the few people still got the priceless treasure, but unexpectedly, troubles came one after another. Wanda and Otto betrayed George to the police, George was arrested, but the diamond was hidden by him. In order to find out the whereabouts of the diamond, Wanda seduced George's lawyer Leach (John Cleese), and was almost caught in bed by Leach himself. Wanda, who escaped in a panic, left a necklace at Leach's house with the key to open the diamond treasure box. Wanda was extremely frustrated and tried every means to ask Leach to return the necklace. However, she was too impatient and made a lot of jokes. Meanwhile, the evil Ken was about to kill her...