Watch or Download Detective Conan Movie 15 : Quarter of Silence

The Governor of Tokyo, Yuichiro Asakura, receives a threatening letter the day before the opening of Touto Line, a new train line for the Tokyo Metropolitan Subway. During the opening ceremony of the line, Conan Edogawa and the Detective Boys are driven by Professor Agasa and pass under the Touto Line. Conan, having heard about the threatening letter, notices explosives connected to the rails. Using his original voice to inform the police as Shinichi Kudo, he is able to stop the train and divert traffic away from the explosives, preventing any deaths.

Conan researches Asakura's political history for a clue on the culprit and learns that the governor was in charge of the construction of a dam in Kitanosawa, a town in the Niigata Prefecture. Due to the dam's construction, the citizens of Kitanosawa were forced into a new town and their old homes were submerged underwater. Since Asakura's trip to celebrate the anniversary of the dam is canceled by the bombing, Conan speculates information on the bomber could be found in Kitanosawa and plans a trip there.