Criminal investigator Xia Qiming returns to his hometown and reopens his father's cold case from twenty years ago. Faced with a maze of clues and tangled interests, he holds fast to his faith in the rule of law and painstakingly searches for the truth. With help from his comrades, he not only clears his father's name but also protects the peace and justice of the local community, fulfilling the mission and responsibility of a people's police officer.
