When officer Kento Saegusa (Kentaro Sakaguchi) picks up a dusty old police radio that's about to be scrapped, it brings him into contact with Takeshi Oyama (Kazuki Kitamura), a hot-blooded detective from the past. The two detectives, one from the past and one from the present, have worked together to solve countless cold cases. Now, they're back together once more! Tokyo 2021. A high-ranking government official is killed when his chauffeur loses control on an expressway. Saegusa from the Cold Case Investigation Unit suspects it was far from accidental. Meanwhile, in 2009, parliamentary officials are dying in a succession of fatal car crashes. While the police write them off as accidents, Oyama is the only one convinced of foul play. This time, Saegusa and Oyama are forced to go up against corruption in their own home: the police force. And this time, will they finally reunite in the present?