Unemployed man Hanzaki Yasuo is frightened when he sees office worker Takedera Hitoshi wearing a costume and slips and falls to his death at Beimyoji. Takedera has no malicious intentions, but because he caused an accidental death, it`s unlikely he`ll be cleared of charges. After questioning Takedera`s acquaintance first year student Kota and office workers Arisa and Susan who witnessed the incident, Conan and his friends suspect there may be more to the case. The Detective Boys investigate the case and close in on the truth, but later, a new incident occurs...