Ren Daxiang, the deputy director of Criminal Investigation Department in Public Security Bureau (PSB), Xu Jinan and Guan Wei, black sheep in the Police, collude with Yuan Wanchun. They set a trap to kill Chen Yunqing and Geng Fengchen's brother and take away their property. Lin Yin is transferred to be the director of Fu'an sub-office of Fuchun City. At first, he is cheated by Ren Daxiang. However, at last when Lin knows the truth, he makes a meticulous plan and obtains the irrefutable evidence of their crimes, catching the whole lot in an action.