Luo Feifei, a girl from the 21st century, was transported to a mysterious world of the past -Huang Dao Guo. In the nation of Huang Dao, its leadership is rotated among the 12 constellation owners every thousand years. There, Fei Fei meets the current emperor of the nation, Beitang Yi, who also owns the Capricorn constellation.
To protect her eldest sister, Yueling, the youngest princess of Dongyu, becomes engaged to Zhou Shiyu, the North Prince of Beishuo. During their journey to Beishuo's capital city, they face numerous assassination attempts. Their connecting jade pendant activates a Time Gate, allowing Yueling and Zhou Shiyu to repeatedly revive and strive to change their destiny while addressing their nation's challenges.
The story tells of two groups of youths who are at odds with one another, who must work together to merge the two factions together. Chaos arises when the leader of the Northern faction Ming Ze Yu, and the leader of the Southern faction Yi Zheng He become classmates in the same class.
