Conan, Ran, and Kogoro are on their way to a Yōko concert when Kogoro discovers he lost his ticket. He overhears a woman named Masayo on the payphone and her situation about a friend who is unable to go to the concert because of a cold. Kogoro asks h... (more)er for the spare ticket and she accepts as long as Kogoro drives her to her house to pick up her sister, but they find Masayo's sister dead.