The Mystery of the Spanish Chest

Poirot is called in to help a woman who lives in fear of her husband, and he is invited to a dinner party which goes horribly wrong. Then Colonel Curtiss, the scar-faced prime murder suspect, even unwisely calls Poirot a detective. The detective finds that the murder mystery hinges on a duel fought ten years before. He soon proves Curtiss to be the killer who pushed a stiletto blade into a trunk, straight into the head of a man hiding in the trunk. As the police take the Colonel away, he adds insult to injury by sneering at that bloody little Frog... but it was by getting such details wrong that he got himself caught.