The chief detective is taking a vacation at a Yamanashi inn when he discovers a corpse and a murder on-site. Wile being a suspect himself he begins to try to unravel the mystery. To do so he calls in his landlady who arrives with company. The local cops are trying their hand at solving the case when the help of the visitors comes in handy. First, however, there are a few secrets of the deceased man that need to come to the surface.