In the middle of the Ming Dynasty, Japanese pirates constantly harassed the southeast coast. The Yagyu clan of Japan assisted Tokugawa Ieyasu and also wanted to sweep the Central Plains martial arts world. So the "Japanese Tyrant Sword" Yagyu (played by Simon Yam) entered the martial arts world and was invincible. He also wanted to challenge the "Heavenly Sword" Dugu Wuji (played by Damian Lau), the number one martial arts master in the Central Plains. Dugu Wuji was about to marry his new wife Meng Qingsi (played by Michelle Yeoh), but had to delay for this matter. He asked the "Ghost Doctor" (played by Ng Man-tat) for help, and then used poison to increase his power several times. On the day of the competition, Dugu Wuji fought Yagyu and drove him away, but he was confused by the poison in his body, so he confusedly killed countless friends in the villa and angered Qingsi away. Qingsi has since dressed in men's clothes, changed her name to Dugu Zhen, and killed all the unfaithful people in the world. In order to escape from his much older fiancée Niu Wa (Cheng Yuling), Wu Tong (Zhang Weijian), a disciple of a ghost doctor, escapes on the day of his wedding. He happens to meet Princess Tianxiang (Maggie Cheung) and her personal guard (Sandra Ng) who are traveling incognito. The three of them have a dispute, and Dugu Zhen appears to rescue them. At this time, there are rumors in the town that Meng Qingsi has set up a magic array in the brothel to summon the wise to compete in martial arts. The surprised Dugu Zhen goes with Wu Tong to find out what is going on...