A top-secret assassination mission brings together the righteous martial artist Fu Xiao and the cold-hearted commander Yan Chang Yun, who initially clash. After a mission failure causes Fu Xiao to lose her memory, she becomes an innocent "little white rabbit" and is reluctantly drawn into Yan Chang Yun’s quest for revenge. As they navigate the dangerous court and martial arts world, they uncover and right an old injustice, ultimately forming an unbreakable partnership.