A top-secret assassination mission interweaves the originally unrelated lives of the righteous chivalrous woman Fu Xiao and the sinister leader Yan Changyun. Due to a careless move, Fu Xiao fails in her mission and becomes an amnesiac little white rabbit, and is forced to be involved in his revenge plan. The two of them are cautious in the turbulent court and the dangerous rivers and lakes. The old injustice is redressed and the descendants of the loyal and good can finally be vindicated. After everything is settled, the two do not linger on power, fame and fortune, and choose to be a pair of immortal lovers and retire to the countryside to spend their lives together.