Little Phoenix Xu Nanyi travels through time into a fantasy world, becoming the daughter of Xu Yuan, the Empress of the Demon Realm, and Shen Jiuyuan, the Lord of the Devil Realm. Together with her system-bound best friend and her twin younger brother, Shen Xizhou, she grows up while resolving misunderstandings and protecting her family through a series of hilarious everyday adventures. As sealed memories and various powerful factions gradually come to light, the family joins forces on an adventure to uncover the truth.