In the immortal realm, Dao Zheng is renowned for his stern demeanor and formidable magical powers, while Hua Ying, despite being seventy thousand years old, is as mischievous as a little fox and constantly gets herself into trouble. Although their personalities are completely different, an unexpected spark develops between them as they spend time together. Tian Ying, a promising young immortal, is suddenly declared wanted by the Heavenly Emperor for an extremely serious crime. However, Tian Ying's magical powers are formidable, and he takes Dao Zheng's mount, Yang Li, hostage before escaping from the Heavenly Court. To bring Tian Ying to justice, Dao Zheng and Hua Ying exchange identities and descend into the mortal world. In the end, they successfully subdue Tian Ying.