The Trap of the Rooftop Farm Kogoro, Ran, and Conan are invited to assist in a rooftop farm. Once there, they discover the elderly farmer, Takehiko Nakamura, dead from a head injury. The police are brought in and the other three farmers are interrogated for the death. Conan's discovers a shattered brick with a hole and discerning how Nakamura was murdered, tranquilizes Kogoro and reveals the farmer Marie Inoue to be the murderer. Conan reveals that she hung a brick on the handrail and concealed it with a towel and lured Nakamura to it with a phone call. When he was close enough, she pulled a rope connected to the brick hitting him on the forehead causing him to lose his balance and having him fall into the corner of the water tank...