A modern girl, Jiang Ning, is unexpectedly involved in a car accident and transmigrates into the body of a farm girl who died after her fiancé, Zhuang Yunqing, betrayed her and drove her to bang her head against a wall. Upon awakening, she publicly fights back, breaks off the engagement, and reclaims her compensation. However, after a disturbance at the academy, she ends up married to the scholar Lu Huai'an. Little does she know that Lu Huai'an has also been reborn and, in his previous life, had his leg broken and harbored a bitter desire for revenge. One possesses a mysterious inner space and a crescent-shaped birthmark, while the other carries memories of his previous life and a mark left by the Wuyue Sword. From mutual wariness to genuine devotion, they join forces to counter the schemes of Zhuang Yunqing, Liu Xueying, and others, while gradually uncovering the secrets hidden behind their identities.