This work is unique. Usually, detective stories written by the great Agatha Christie were immediately sent to print. And this novella was miraculously lost in dusty archives for 70 years... The famous detective Hercule Poirot received a call from his old friend, detective writer Ariadne Oliver, with a request to urgently come to Devonshire to the Greenshore House estate. It turns out that a big celebration is planned in the house, and she was invited to organize an exciting game “Hunt for the Killer”. Players, using non-obvious clues, must discover a “corpse” on the territory of the estate, the role of which is played by one of the guests, and expose the “murderer”. Ariadne wanted Poirot to help her with the organization, and the great Belgian could not refuse. But when the game had already reached its climax and its participants discovered the “corpse”, it turned out that he was... real! So, the games are over. Hercule Poirot himself was on the trail of the murderer...