Liu Jianming (Andy Lau) was investigated by the police force 10 months after the murder of Chen Yongren (Tony Leung Chiu Wai). His power was taken away, and his mental state deteriorated due to family changes, but he firmly believed that the situation would soon turn around. Young Superintendent Yang Jinrong (Leon Lai) was seen as a weirdo by his colleagues. He was moving towards the top of the police force with his outstanding performance. In order to find out the true identity of Yang Jinrong, Liu Jianming began to investigate him. Liu Jianming gradually discovered that Han Chen's old business partner Shen Cheng (Chen Daoming) had a close relationship with Yang Jinrong. In order to put Yang Jinrong to death and to prevent his identity from being exposed, Liu Jianming, who had long desired to be a good person, began to search for evidence one by one with great difficulty, but he always failed when he was closest to the truth.