Nine towering red palace doors, mysterious and enchanting white begonias... Eighteen-year-old female college student Mu Yixi has been powerlessly wandering in these strange dreams since she came to Xi'an. While inspecting the ruins of the Daming Palace, she unexpectedly returned to the early Tang Dynasty 1,300 years ago. Zhongzong was incompetent, Empress Wei was in chaos, and Princess Taiping was in power for a while. In the troubled times, the princes and princesses were suspicious of each other and fought with each other. In such chaos, how will Mu Yixi surprise Datang? Where will she go?