Komisario Palmun erehdys (Swedish title: Mysteriet Rygseck; international titles: Inspector Palmu's Mistake or Inspector Palmu's Error; US DVD title: The Rygseck Mystery) is a 1960 Finnish crime comedy film directed by Matti Kassila for Suomen Filmiteollisuus. It is set in 1930s Helsinki and centers on Inspector Palmu's investigation of the murder of rich and decadent Bruno Rygseck. It is based on Mika Waltari's 1940 novel of the same name, and was the first film adaptation of his Inspector Palmu novels.

Plot

The film opens with a scene of guests arriving at the crime-themed dinner party of Bruno Rygseck, the rich and decadent heir of the Rykämö concern. The guests are his cousins Airi and Aimo Rykämö, Airi's fiancé Erik Vaara, who works for the concern and strongly dislikes Bruno, and Irma Vanne, the daughter of vuorineuvos Vanne. In order to scare them as they arrive, Bruno has dressed up as the Grim Reaper.