Hiroshi Hamano, a professor at a medical university, is found dead. Going by the results of the autopsy, it appears he committed suicide by jumping off a roof, but going by eyewitness testimony and physical evidence at the scene, Detective Kamei suspects murder. A ticket for a train trip around Japan is found in the professor's pocket. However, nobody then could have known the shocking truth hidden behind the tour the dead man was supposed to attend...
A woman named Fujiki Asuka arrives as an acquaintance of a sister in law for a day under the bar master Tamura who had guided Yakuza's escaping as a shoji. Tamura who lives on the second floor of the store for the time being the son who wants to work here. A few days later, Tamura finds a handgun from Yuko's baggage and holds a suspicion ....
