The Crooked House sits on a snowbound cliff at the remote northern tip of Japan, a maze of sloping floors and strange staircases, full of bloodcurdling masks and uncanny dolls. When a guest is found murdered in seemingly impossible circumstances, the police are unable to solve the puzzle, and more bizarre deaths follow. Enter Kiyoshi Mitarai, the renowned sleuth. Surely if anyone can crack these cryptic murders it is him. But you have all the clues too - can you solve the mystery of the murders in the Crooked House before he does?