Modern girl Xi Yuan travels to the realm of Xuanji, where she faces numerous dangers, and her true identity and hidden powers gradually emerge. With the realm's safety at stake, Xi Yuan bravely confronts significant challenges, demonstrating her courage and resilience while striving to protect those around her.

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.