After an unlucky while at the pachinko salon, Kogoro who walks about sees Conan at a small police office near a train-station. He walks in angrily only to find out that Conan was there only to return a found wallet. As they are about to leave the well-known comedian Rokusuke DoDonPa (real name: Rokusuke Tanigaki) walks in and announces to have murdered his chief.

Conan, Ran, and Sonoko visit the hotel room where Masumi Sera is living. In the hallway on the 30th floor of Sera's hotel, various editors wait for famous romance author Hiura Keigo to finish his manuscripts. Later, Hiura's assistant Minazuki Chiori is found murdered in the room directly below Hiura's.