The murder of a taxi driver remains unsolved, and a corpse-burning case occurs in Sanchahe. The two cases are intertwined with clues from similar techniques and strange license plates. Interpol Zhu Jinling's investigation found that the identity of the deceased in the corpse-burning case was reversed, involving the black car drivers Xiang Biao and Shin Xiaoxin and the provincial capital car owner Luo Hong.
Xiang Biao seems to be assisting in the investigation, but in fact he controls the overall situation. Shin Hyo-shin is hiding a murder suspicion, and Luo Hong sets up a trap for frame-up. As the truth is revealed layer by layer, the chaos of the black car industry and the greed of human nature are fully exposed.
In the end, Zhu Jinling set up a trap before being transferred and used the evidence in Shin Hyo-sin's old car to break through his psychological defense. Even if he encountered a car accident caused by Xiang Biao, he used the backup driving recorder to lock in the evidence and protect justice with his life, so that the real culprit could be brought to justice.
