In a rented house, the body of a young widow is found—she was shot. All the signs point to suicide: a locked door, a pistol in the dead woman’s hand… However, the doctor who examined the body at the scene is very doubtful. The pistol is clenched in the right hand, while the wound is on the left side of the head. The doctor reports his suspicions to Inspector Japp, and Japp, in turn, contacts his old acquaintance, the famous detective Hercule Poirot. Japp knows: the stunning Belgian loves this kind of puzzle. Poirot also doesn’t believe the suicide version—especially after he learns that the weapon’s fingerprints were carefully wiped in advance and that a large sum of money has gone missing from the house. But then who killed her? And Poirot begins to draw up a circle of suspects…