Li Weining, a half-human, half-demon girl, follows her mother into the imperial palace, only to discover that her biological father, the emperor, intends to seize her mother's thousand-year-old demon core to prolong his imperial reign. Faced with his schemes, Li Weining awakens her fierce bloodline and becomes a fiercely protective daughter. She strikes back decisively, not only tearing apart the wicked imperial consorts but also publicly exposing her treacherous father's murder of his elder brother and usurpation of the throne, leaving him abandoned by everyone. After reuniting with Bai Rongjin, the young lord of the Nine-Tailed Fox Clan and her childhood sweetheart, they join forces to slay a rampaging snake demon, depose the cold-blooded tyrant, and place her younger brother on the throne. In the end, Li Weining and Bai Rongjin marry and retire together to the mountains, writing a thrilling legend of a half-demon girl's rise to power and a love in which both choose each other.