Lam Hai Binh lived in seclusion in Quat Thuong mountain, changing his daughter's name to Bach Van Phi. His wife Thuy Diep, out of dissatisfaction, stole the secret manual and took their daughter Tieu Diep away. The martial arts world was in chaos when the head of the Shaolin and Vo Dang sects went missing. Huyen Thanh sent Quan Vo and Thanh Loan to report the news. Quan Vo met Phi Phung and Tao Hung, and became sworn brothers with Hung. Tao Hung became evil and plotted to harm Quan Vo. At this time, rumors of the Quy Nguyen secret manual reappeared, leading to Cai Thien Giao's plot to destroy the martial arts world.