Kogoro, Conan, and Ran come across the scene of an accident. A man named Yaginuma fell to his death from the emergency staircase of a parking structure. On top of the stairs was Misaki, who claims to have been attacked by Yaginuma. She claims Yaginuma fell head first when she avoided his attack. One week earlier, Yaginuma broke into Misaki`s home and murdered her husband Takizawa Akira and stole 100 million yen worth of precious jewels from their safe. Kogoro believes Yanagi attacked Misaki to silence her, but after looking at Yaginuma`s body, Conan realizes there`s something wrong with…