Deputy Director of the Provincial Public Security Department's Supervision Office, Lu Jianchun, led a team of supervisors to Mingchun City to investigate the implementation of the "20th National Work Conference." Coincidentally, during the public trial of the Zhang Qiubo criminal gang with mafia characteristics, they collectively retracted their confessions in court. Zhang Qiubo displayed the numerous scars on his arm, accusing the police detectives of torture during interrogation. The Mingchun police were under immense pressure from the media and all sectors of society, especially Captain Sun Pingwei of the Major Cases Team of the Criminal Investigation Brigade - the inexplicable death of Detective Chang Lu in a hair salon girl’s rented apartment; the lost interrogation videotape that could have proven the detectives' innocence, leaving their credibility teetering on the brink; and the mysterious death of his estranged wife after she proposed a breakup... Just as the case began to reveal some clues, the Public Security Bureau Director of Mingchun City...