Qiao Yun, a beautiful woman with the mind of a child, suffered a head injury when she was young and became a pitiful girl neglected by her father and unloved by her stepmother. When she grows up, her stepsister even tries to steal her marriage to the Crown Prince, forcing Qiao Yun to marry in her place into the household of Shen Jue, the gravely ill and infamous mad Prince Qi, in hopes that the wedding will bring him good fortune. Unexpectedly, the two gradually fall in love as they spend time together. With Qiao Yun's inadvertent help, Shen Jue recovers from his illness, while she finds the warmth of a real family in Prince Qi's residence and eventually regains her mental faculties through a twist of fate. Together, they defeat their many enemies and overcome every obstacle. In the end, Shen Jue ascends the throne, Qiao Yun becomes his empress, and the two rule the realm side by side.