The modern girl Tang Miaoxin accidentally traveled into the Dayan game copy and became the unpopular second daughter of the Wanhu Marquis. The system told her that she could only return to reality by solving the stories behind the key characters in the game. The emperor arranged for the marriage of Tang Jiangxian, the daughter of the Wanhu Marquis, to Ning Guzhou, the Prince of Qin. In order to avoid the persecution of the crown prince, Ning Guzhou was poisoned. In order to protect the safety of his biological mother and sister, he had to defile himself and become cruel, which made him have a very bad reputation in the capital. Tang Jiangxian was unwilling to marry Ning Guzhou, so Li asked Tang Miaoxin to marry her instead. In order to complete the task, Tang Miaoxin agreed to marry Ning Guzhou, and the truth behind this was also revealed one by one...