On the seventh day after his daughter Chen Xiaoduo disappeared, after Chen Zhen exhausted all means to no avail, he publicly announced that if no one was found before midnight on the eighth day, he would detonate bombs planted throughout the city and bury the entire city with her. The leader of the task force, Shen Yao, must not only track down the real culprit, but also stop Chen Zhen's madness. Zhao Mingyuan is caught in the dilemma of loyalty and justice, Zhou Wenbin secretly destroys evidence, but Lin Xue digs out a fatal clue from a child's words from his daughter - this countdown is not only revenge, but also a huge network that overturns the underground organ trafficking network.