A female killer was reborn in the first year of Kangxi of the Qing Dynasty after her mission failed. In this life, my maternal grandfather was an official in the court, and because of his extraordinary martial arts, Xiaozhuang appointed him as the emperor's master. The female killer has practiced martial arts since she was a child, and was appreciated by Emperor Kangxi as his personal bodyguard. After several life-and-death fights, Kangxi asked her what reward she wanted, and even wanted to take her into his harem. But what the woman was thinking of was the war of aggression against China more than two hundred years later, and the Japanese pirates more than a hundred years ago. National hatred and family hatred made her understand that a stable life cannot only focus on the present. So she asked Kangxi for three thousand elite soldiers, and personally led the massacre of Dongyang Island, killing all the brave and ruthless nation. When she kills everyone on the island, she realizes that she has changed history. And history is changing because of her, and everything starts to move according to another trajectory.