Inspector Ishida makes his long-awaited return in this classic-style whodunit! Ishida and the rabbit ronin are escorting a killer to trial when a storm forces them to take refuge at a roadside inn. The inn's other guests include a court noble and his entourage, a paper merchant and his daughter, and a quiet samurai, all driven there by the rains. When one of them is murdered during the night, it's up to Inspector Ishida and Usagi to solve the mystery.