Eri Kisaki is getting her hair done by her barber, Minayo Hasaka, prior to having dinner with Kogoro, Ran, and Conan that evening. Kogoro, who was on his way to pick up Eri, finds a dead body at a garbage collection point. The police arrive and Conan reveals that the victim, Shir? Nagasaku, was killed while receiving a hair cut as evidenced by the hair particles found mixed in his blood. Kogoro suspects Hasaka to be the murderer, but Eri counters his accusations, stating Hasaka only left her sights for a ten-minute period, during which Hasaka left to throw away the trash at a local convenience store. Eri stats that it would be impossible for Hasaka to carry a body to the bottom of a hill during that time period. During the investigation of Hasaka's salon, Conan notices that the back alley of Hasaka's salon is directly above the garbage collection point and the convenience store is in the opposite direction.