To avenge the extermination of the Chen family, Chen Ping'an returns in the identity of the Long family's son-in-law. He resolves internal and external troubles of the Long family, joining hands with Long Wanqing, Wang Fengzi, and others to investigate the conspiracy of enemies Yuan Wenyuan and the master of the Profound Yin Sect. In the decisive battle at Hengduan Mountain, he kills his enemies with his own hands and clears out the dark agents of Longjiang. Finally, he marries Long Wanqing, protects the Long family and his beloved, and opens a new life. The story conveys the warm conviction that "family members share one heart, and justice will ultimately be manifested".