Lin Youwei, a modern young woman, transmigrates into a novel set in a bygone era. Learning that the original heroine married the scumbag Ming Yanzhou by mistake, only to be abandoned and meet a tragic end, she quickly changes her choice overnight and selects Ming Yancheng, her elder brother-in-law, who is rumored to have a lame leg and whom no woman is willing to marry, to save her own life. When the second branch sets a trap for her, Ming Yancheng publicly stands up for his wife instead. Armed with a miraculous medical system, she fights back against those who make things difficult for her and outsmarts the household schemers, while Ming Yancheng consistently supports and protects her. As they initially pursue their own interests, genuine feelings gradually develop between them. She heals his leg and helps him reclaim his dignity, and together they establish their place in the Ming family and ultimately find their happy ending.