Gao Qiang, once a powerful figure in Kyoto, has lived in seclusion for ten years, making a living as a fishmonger. When his younger sister, Gao Lan, is harmed, he steps forward to protect her. With the help of an undercover police officer and righteous allies, he refuses to take revenge through vigilante violence and instead relies on the law to bring criminal forces to justice and uncover old grudges. In the end, all the villains are punished, Gao Qiang finds genuine love, and his younger sister overcomes her trauma and finds a loving partner, demonstrating that justice will prevail and that the rule of law and the nation stand above personal vendettas.