Su Nian'an returns to the day her fate took a turn, determined to change the course of her life. Facing her family's favoritism and her younger sister's constant schemes, she refuses to endure mistreatment any longer and uses her medical skills and intelligence to overcome one crisis after another. At the Jiang family's birthday banquet, she unexpectedly saves Jiang Haoyu, the heir to the Jiang family. The two become connected and enter into a contractual marriage. As they spend more time together, they gradually move from mutual exploitation to genuine trust, joining forces to uncover a long-buried family secret. In the end, Su Nian'an breaks free from her family's control, remains true to her calling as a doctor, finds sincere love, and achieves personal growth.