Jiang Shuyi's gambling-addicted father fled after accruing massive debts, leaving her as collateral to loan sharks. Ling Xiu intervened to settle the debts, demanding Jiang serve as his lover and personal secretary for five years. She agreed. During these years, Jiang devotedly assisted Ling in daytime operations while fulfilling his sexual needs at night. As the contract's final day arrived, Jiang declared her impending freedom, though bittersweet emotions lingered. Though she had developed feelings through their prolonged intimacy, repeated incidents confirmed she remained merely a mistress in Ling's eyes. Resolute, she departed. When Ling discovered Jiang's resignation, initial disbelief gave way to self-realization. Recognizing his suppressed affection, the once-domineering tycoon embarked on a journey to win back the woman who had unknowingly captured his heart. Their reversed dynamic now paved the way for a poignant courtship, where pride yielded to vulnerability.