Lord Oda Nobunaga plans to control Japan where rival warlords battle by waging war against several clans. His vassal Araki Murashige stages a rebellion and promptly disappears.
In her beloved car, "Grace", a wife is on her way to Narita. Following a bus accident that kills her, her husband, Kikuo, gets access to her GPS which contains the history of all the places she travelled to without his knowledge. Suspecting infidelity, Kikuo embarks on a journey to trace the history of the car's GPS in order to solve the mystery.
Kamata Maro (Tsukamoto Takashi), a freelancer who calls himself a detective, works part-time at a yakiniku restaurant in Kyoto, while living a carefree life. He spends his free time with Gennosuke (Daichi Asai), a bumbling fighter, and Kenta (Yuta Yamazaki), a genius hacker. One day, he receives a request from his favourite cabaret girl to search for his missing father.
Ami, who lives a peaceful married life, meets Jun, a young painter, due to an incident at work one day. She takes on the role of a painting model lightheartedly, but the two gradually become strongly attracted to each other.
The story continues from the Japanese SIGNAL drama series. In 2021, a limousine taxi driver causes an accident on a highway, and a high-level government official dies in the accident. The cold case investigation unit, including Kento Saegusa and team leader Misaki Sakurai, have doubts about the case. Meanwhile, in 2009, administrative officers die consecutively in car accidents. The police announce these deaths as accidents. Takeshi Ōyama believes that these deaths were not the product of simple accidents. At 11:23 pm, a walkie-talkie turns on and makes a connection between the future and past. Kento Saegusa and Takeshi Ōyama face the threat of bioterrorism.
The story continues from the Japanese SIGNAL drama series. In 2021, a limousine taxi driver causes an accident on a highway, and a high-level government official dies in the accident. The cold case investigation unit, including Kento Saegusa and team leader Misaki Sakurai, have doubts about the case. Meanwhile, in 2009, administrative officers die consecutively in car accidents. The police announce these deaths as accidents. Takeshi Ōyama believes that these deaths were not the product of simple accidents. At 11:23 pm, a walkie-talkie turns on and makes a connection between the future and past. Kento Saegusa and Takeshi Ōyama face the threat of bioterrorism.
