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A story that follows Chen Tingjing, a righteous man who becomes a premier of the Qing Dynasty. In the 23rd year of the reign of Kangxi, Chen Tingjing (Tao Zeru) receives orders from the Emperor (Zhu Hongjia) to investigate a fraud case in Shuntian Village. The case ignite Chen Tingjing's difficult campaign to fight corruption and promulgate reform as he becomes embroiled in the political struggle amongst powerful factions within the royal court.

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. Cold case investigation team, 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.