Kogoro appears as a guest on a radio show where he discusses the topic of an obnoxious woman living in the apartment above the listener's. Several hours later, apartment resident Kumi goes to yell at her downstairs neighbor Towako. Kumi is furious she was mocked on a radio show, and the two get into an argument. The next morning, Towako's body is discovered, and the police suspect Kumi killed her. Towako is the estranged wife of radio producer Manda. The police believe Manda is also involved in the case, and...