In the fall, there was a bombing at Nichiuri TV. Inside the facility, the Satsuki Cup, which determines the victor of Japan's Hyakunin Isshu, is now being recorded. The occurrence causes a ruckus, and as the building burns to the ground, the only individuals left inside are Heiji and Kazuha. Conan arrives on the scene just in time to save them. The bomber's identity and motivation remain unclear. Conan encounters a strange gorgeous female who claims to be "Heiji's fiancée" as chaos reigns due to the explosion. Momiji Ooka is the Kyoto High School champion in the Karuta game. As fate would have it, Kazuha will be pitted against Momiji in the Hyakunin Isshu.