Conan and the Detective Boys go to the Beika Dinosaur Museum where they watch a show featuring dinosaur costumes. After the show, they hear a loud noise from the second exhibition hall. Museum direction Shida has been crushed by a fossil display. Curator Kuchiki and office clerk Yua begin accusing each other of murder, but show host Naito jumps in to defend Yua. It seems that nobody liked Director Shida. While the police question each of them individually, the Detective Boys search the museum for clues, and...

Towako's body is discovered the morning after Kogoro appears as a guest on a radio show where he discussed the topic of an obnoxious woman living in the apartment above the listener's. Radio producer and prime suspect Manda is taken to the police station for questioning, but Conan, believing the slick Manda couldn't have carried out such a carefully planned murder, suspects news presenter Inuyama and director Kujirai. He speaks with AD Rie, who tells him about the debut work of broadcast writer Kaede. While listening to a recording of the drama, Conan realizes something...