The modern girl Li Ezi accidentally traveled back to the Southern and Northern Dynasties when she was traveling to save people. She met Gao Changgong, the God of War in the Northern Qi Dynasty, and Yuwen Yong, the leader of the Northern Zhou Dynasty.
Li Ezi exchanged identities with Zheng Qiner, the third lady of the Zheng Mansion, and married into the Lanling Prince's Mansion for her, becoming the acclaimed Princess of Lanling.