The rape and murder suspect dies in the interrogation room due to being beaten up by the crowd earlier. The three teams responsible for this case are also imprisoned together, while the other suspect is still at large. After being released from prison, the three teams, led by their captain Cheng, track down their whereabouts. They pursue the culprit for twelve years.

Qin Hao, Li Naiwen, Chen Minghao, Ma Yinyin, Tong Liya, Ren Min, Yang Xinming, Fan Lei, Li Xiaochuan, Lin Jiachuan, Liu Yitie, Yin Zhixuan, Hu Yajie, Wang Jiajia, Wei Xiaodong, Liu Tianzuo, Liu Nan, Niu Yinhong, Zhao Da, He Zhengjun, Zhu Yuanyuan, Sha Yi, Yuanli Ruoxin, Lin Xiaofan, Cao Minghua, Johnson Chen, Qiang Gao, Geng Yizheng