Conan Edogawa comes to a bathhouse with Ran Mouri and Ai Haibara. There, he sees suspicious men in the dressing room of the men's bath. However, Conan falls down in the bathhouse and loses consciousness. The two suspicious men, Tatsu and Kondo, take him away in a car. The two belong to the underworld and seem to be working at someone's request. Meanwhile, a woman named Kanae visits the Mouri Detective Agency to request an investigation into her husband's affair. She shows them a picture, and the husband in the picture is one of the culprits who kidnapped Conan.