Qian Long is framed by his sworn brother Han Chen and serves ten years in prison carrying a wrongful charge. After his release, he resolves to stay away from the underworld, single-mindedly investigating the truth of his wife's murder and repairing the rift with his rebellious daughter Shen Niannian. Due to past trauma, his daughter roams the streets, and father-daughter conflicts run deep. During his investigation, Qian Long gradually discovers that Han Chen is the real mastermind behind the events of back then. Knowing the truth, Qian Long unites with old subordinates, working on the one hand to resolve his daughter's inner knot while on the other collecting evidence to confront Han Chen, who holds immense power and is ruthless. In the end, Qian Long publicly exposes all the conspiracies, executes the enemy with his own hands, reconciles with his daughter, and yet a new underworld cultivation plan quietly opens in the dark.