Jiangtai City Criminal Police Chen Mo made a mistake in his judgment while investigating a dismemberment case, which resulted in the murder of one of the important persons involved in the case, Sun Xing, and the disappearance of another person involved, Yin Ziyue. The Criminal Police Team was punished by his superiors and Chen Mo was suspended. Chen Mo, who left the police team, made a living by driving an online car-hailing service and fell into a trough in his life. At the same time, the Jianghai Criminal Police Detachment in the neighboring city was caught in a live kidnapping dilemma. Chen Mo claimed to be a Jiangtai Criminal Police and provided important clues, discovering that the woman in the live video was Yin Ziyue, who had been missing for several months. The Jianghai Detachment held different views on Chen Mo's uninvited visit. Amid various doubts, Chen Mo quickly solved the case with his keen insight, and also brought a mystery from 10 years ago to the surface...