Su Na, the heiress of the Su family, refuses to be married off to the tyrant Sheng Tianxiong in exchange for 80 million. While fleeing her forced marriage, she jumps into a river and is rescued by Laxi, a man living under an assumed identity. To escape further coercion, they pretend to be a couple. Posing as an ordinary man, Laxi stands by her as she faces family pressure, workplace exclusion, and project crises. Unwilling to become a bargaining chip, Su Na vows to reclaim the Qinghe Bay project she built and take control of her own life. Laxi secretly protects her throughout, while his mysterious identity gradually comes to light.