Case Closed: The Crimson Love Letter(2017)

Overview:

Bombing case at Nichiuri TV in autumn. The Satsuki Cup, which crowns the winner of Japan's Hyakunin Isshu, is currently being filmed inside the facility. The incident results in a big commotion and, while the building is burning to ashes, the only people left inside are Hattori and Toyama Kazuha. They get rescued just in time by Conan , who rushes to the scene. Both the identity and purposes of the bomber are unknown.