Haneda Shukichi, also known as Taiko Meijin, takes on Katsumata Chikara in a meijin title match in Yamanashi Prefecture. Just before the second day's match begins, Shukichi receives a threatening letter from a man calling himself the Headless Shogi Player who claims to have kidnapped Shukichi's girlfriend Miyamoto Yumi. In order to save Yumi, Shukichi announces he needs time to think and takes a taxi to Tokyo. Interpreting the code labelled "first game," Shukichi arrives at Meiji Jingu where he runs into Conan and his friends as they visit power spots. The code pointed to Kato Kiyomasa's well. After hearing about the situation, Conan searches the area around the well and discovers the second game's code left behind by the culprit...