Xue Wan'er, an illegitimate daughter of the Xue family, has a one-night encounter with Rong Yanyuan, a general of the Rong family, while fleeing. After giving birth, her legitimate elder sister takes her child away, and she is rescued by Master Gong. When news arrives that Rong Yanyuan has died in battle, Xue Wan'er is forced to marry in place of Gong Zhaotang, the legitimate daughter of the Gong family, and becomes the general's widow. Enduring humiliation while secretly plotting revenge, she skillfully navigates the dangers of the Rong household. Rong Yanyuan returns from the dead and recognizes Xue Wan'er as the woman he has been searching for, thanks to a birthmark. To their surprise, little Jin is their biological son. Moving from suspicion to reunion, the two join forces to fight back and manipulate Xue Jingque and her husband into turning against each other. In the end, the emperor pardons Xue Wan'er for the crime of substituting for the bride and permits her to marry Rong Yanyuan formally under her real name.