After Wu Mengtian, the legitimate daughter of Duke Wu's mansion, traveled through time, she met her fiancé Jiang Yuan on her wedding day and took him out of the house to welcome her. She took the opportunity to propose to break off the engagement but was rejected. In order to force the Jiang family to relent, she kidnapped Xiao Yun, an ascetic monk who wanted to be tonsured, from Longyuan Temple and called it the "outer chamber" to the outside world. Unexpectedly, Xiao Yun is actually the prince. He hides his identity and cooperates with Wu Mengtian. The two gradually develop feelings for each other while dealing with the Jiang family. In order to cling to power, the Jiang family refused to break off the engagement and even brought in the royal family to help. However, the emperor secretly favored the prince and the Wu family repeatedly ran into obstacles. In the end, Wu Mengtian not only successfully broke off the engagement, but also discovered Xiao Yun's true identity, starting a special relationship.
