The female lead, Lin Xiaoxi, learns that her biological father is the heir to a billionaire fortune, only to be involved in a car accident shortly after. Her mother dies on the spot, and her father falls into a coma. The shock causes Lin Xiaoxi to lose her voice, and without care, she is abandoned by her grandfather. The maid raises her under the billionaire's nose, using her birthmark to conceal her true identity. Fifteen years later, the billionaire finally awakens, but the female lead's identity is replaced by an imposter. Through her interactions with the billionaire, Lin Xiaoxi gradually realizes that she is the true heiress.