Kogoro, Conan, and Ran arrive at the boarding house Hatobue Lodge. Also staying at the lodge are entertainer Otaro, web designer Ide, stationery company employee Fujiyoshi, and local magazine writer Shirogane. Otaro's former comedy duo partner Kyujiro's body is discovered. In his possession is a card of the Masked Comet Byun, a character from a TV showed that aired seven years prior. The manager's daughter Miona appears to be frightened by the mention of Byun, and Conan investigates the connection between this case and the robbery and murder committed by the culprits wearing Byun masks seven years earlier.