Kogoro is hired by Junko to catch a thief. While working the case, the body of Junko`s neighbor Kitagami is discovered in the parking lot behind her apartment building. Kogoro reasons Kitagami got drunk and accidentally fell from his room, number 704. Inspector Megure and the police investigate the room, and Conan finds it strange that Kitagami left his front door unlocked when his apartment was fully equippped with anti-theft devices. Conan questions Sawada, the resident of 604 and room directly below Kitagami`s, and believes his death wasn`t an accident. Later, an unexpected person is…