At the end of her life, Bai Qian is reading a deeply frustrating novel about a real heiress and a fake heiress. Just as she is on the brink of death, she unexpectedly transmigrates into the book, becoming a supporting female character destined to be cannon fodder. In the original story, she must compete with the heroine, Gu Shengsheng, for the power of fortune in order to survive. But Bai Qian, who knows the entire plot by heart, refuses to suffer the same fate. Using her precise knowledge of the storyline, she carefully plans every move, successfully takes control of her own life, and overturns her predetermined destiny.