A top-secret assassination mission intertwines the lives of the righteous martial arts heroine Fu Xiao and the cold-faced commander Yan Chang Yun, who initially dislike each other. A single misstep leads to Fu Xiao's mission failure, causing her to lose her memory and become an innocent "little white rabbit." She is then forced to become embroiled in Yan Changyun's grand revenge scheme.

Together, they navigate the treacherous court and the perilous world of martial arts, gradually uncovering and rectifying an old injustice, and discovering a lifelong partnership.