When the Li Family's cherished daughter's engagement crumbles, her relatives swear vengeance on the heartless man who betrayed her. * Fate intervenes when Li Qiao encounters her ex-fiancé's older brother—Shang Yu, also known as Shang Shaoyan. Whispers paint him as Nanyang's most enigmatic figure, while others know him as the ruthless, untouchable underground Overlord everyone fears. Through the rain-soaked night, Li Qiao smiles softly and introduces herself, unaware she's about to become either this dangerous man's sister-in-law or something far more significant. * Months pass before Li Qiao and her ex-fiancé cross paths again. His mocking sneer—"Still following me? Haven't you moved on?"—draws a sharp rebuke from behind: "Respect your sister-in-law!" A new legend spreads through Nanyang: the city's merciless Overlord has found the one woman he unconditionally treasures. That woman is Li Qiao.