After being exiled from the Kingdom of Guangrui, Crown Prince Ji Xuanqian survives only because of Xuelin's sacrifice. Having narrowly escaped death herself, Xuelin hides her identity and lives in the royal palace as a slave. Six years later, Ji Xuanqian returns to Guangrui and finds himself inexplicably drawn to a palace servant. Believing the servant to be a man at first, he gradually becomes consumed by obsession and love. Amid palace power struggles, revenge, and forbidden romance, their fates become deeply intertwined.