Andrew Wyke, a successful writer of crime fiction, who lives in a large country manor house filled with elaborate games and automata, invites his wife's lover Milo Tindle, a hairdresser of Italian heritage, to his home to discuss the situation. Andrew explains that he has tired of his wife and wants Milo to take her off his hands. In order to provide Milo with enough money to take care of her, Andrew suggests that Milo steal some jewellery from the house, with Andrew recouping his losses through an insurance claim. Milo agrees and allows Andrew to lead him through an elaborate charade to fake the robbery. At the conclusion, Andrew pulls a pistol and reveals that the entire plot was meant to frame Milo as a robber, giving Andrew an excuse for shooting him. Andrew then appears to execute Milo by shooting him in the head.