The swordsman Zhang Zhen is injured in a misadventure and rescued by Eldest Sister of Changchun Sect, who has a crush on him. However, Zhang falls in love with the maid Yuenu instead, and conceives twins with her. The couple are killed by a group of evil pugilists later. The Eldest Sister is angry with Zhang Zhen for not accepting her and plans to make Zhang's children kill each other as revenge. The baby girl (Xiaolu'er) is saved by Zhang's friend, Lian Lanyan, while the male infant (Hua Yuchun) is taken away by the Eldest Sister. Lian Lanyan encounters the Ten Villains when he passes through Villains' Valley. He is overwhelmed by them and knocked out in a fight. The baby Xiaolu'er is taken away by the Villains, who surprisingly do not harm her, and instead intend to groom her to become the greatest villain ever. Eighteen years later, the twins meet each other by coincidence.

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