Hattori and Kazuha arrive at the Mouri agency with Osaka's, Inspector Otaki to inform Mouri and, specifically, Conan, of a suspicious case in Tokyo. The police had kept watch on all entrances to the victim, Hidemichi Mizuki's apartment, only to find him hung with a limited edition chair knocked below his feet. Kazuha identifies this chair and confirms that the chair's height is 10cm below where the victim's feet would be while hung. After solving the first mystery, the crew begins to exit the apartment building. While waiting for the elevator, third-floor resident, Nanami, overhears the detective's talk of Kaizou Fuura, a man who caused the victim to be in large debt, and comments on how her husband, too, suffered great losses due to Kaizou Fuura's influence of investing in the stock market. At that moment, Kaizou Fuura appears from the elevator window shooting himself.
