Conan, Ran, and Kogorō are heading to Kyōto to go to a ceremony of one of Kogorō's friends. After that they are start talking about Conan's problem, Conan avoided the conversation to go to the bathroom. Once heading there he meets the two men in black that turned him into a child. The two doesn't notice Shinichi anymore because of the size transformation. Conan sees it as a change to expose their crimes which he starts to follow them which they are heading to the dinning car. Conan tries to investigate them but he has been pulled back by Ran. Conan then tries to place a bug under the seat but Ran caught him again which she pulled away the gum under the seat and place it in the ashtray. They then returned which Conan heard their conversation. Conan noticed that they didn't have a black briefcase anymore which Conan found out their names: Gin and Vodka. Conan heard that there is a bomb in the briefcase which he starts to freak out which he covers it by a math sum. The shinkansen have stopped at nagoya which the two goes off which Conan tries to chase them but got stopped again by Ran. Conan now then tries to find the person who have the briefcase containing the bomb.