Modern times (2023) and the Southern Dynasties (523 AD) are two parallel time spaces connected through a mysterious bronze mirror. Cultural relic restorer Yu Wanqing travels through an ancient Southern Dynasty mirror to an ancient aristocratic family, and is forced to play the role of the missing eldest lady Xie Mingzhao. In getting along with Shen Yan, the piano master in Fuzhong, the two are attracted to each other but each hides their identity as a time traveler. When the blood moon reappeared, Shen Yan confessed that he was actually the prince of the Northern Dynasty who traveled to modern times ten years ago. The two embraced each other and decided to work together to find a way to return. However, Wan Qing was soon involved in the political whirlpool of the prince's marriage, and at the same time discovered that Shen Yan's dual identity led to the collapse of trust. When the opportunity to return appeared again, the two faced the ultimate choice between love and returning home. In the end, Wan Qing chose to stay and face the troubled times of ancient times with Shen Yan. After repairing the last mirror fragment, she gained the choice to stay in ancient times. The two gave up the ties of their respective eras and started a new life in Jiangnan.
