Leung Chang, Yuen Biao is a young man from a wealthy Foshan family in the mid-19th century who trains as a martial artist under two instructors paid by his father. He has fought well over three hundred times in Foshan and won every bout, but unknown to him his father has a scheme: Yee Tung Choi, Chang’s intermediary, bribes Chang’s opponents to throw the fights in order to protect him. This calculated setup lets Chang believe he is a world-class fighter, even though he has not learned the fundamentals of kung fu. The family’s protection comes at a high price, earning him the nickname “The Prodigal Son,” a label whispered behind his back as the costs of keeping him safe mount.
One night, three of Chang’s friends attend a Lok Fung Lin Chinese Opera troupe performance. One friend grows bold and pesters the lead actress, who is revealed to be Leung Yee-tai, Lam Ching-Ying, a skilled Wing Chun master. Yee-tai easily defeats Chang’s friends and humiliates them, prompting Chang to challenge Yee-tai in a bid to avenge the insults. As usual, Yee-tai’s opponent—backed by a bribery plan from Chang’s father—tries to buy a loss, but Yee-tai refuses and defeats Chang, then exposes the truth: Chang has been fighting without real training and lacks true combat sense.
Desperate to learn authentic kung fu, Chang asks Yee-tai to take him on as a pupil. Yee-tai initially declines, thinking Chang would misuse the art, but Chang’s father ups the stakes by buying the Lok Fung Lin troupe and hiring Chang as Yee-tai’s personal assistant, forcing him to shadow Yee-tai everywhere until the master agrees to teach Wing Chun. This arrangement lasts six months and takes them from Foshan to Canton, where Yee-tai’s Wing Chun skills earn the attention of Ngai Fei, Lord Ngai Fei, Frankie Chan Fan-Kei, the son of a Manchu duke who is himself a martial arts master seeking a worthy opponent.
Ngai Fei pushes Yee-tai to fight, and the two are evenly matched until Yee-tai suffers an asthma attack, causing the bout to be postponed. It is soon revealed that Ngai Fei’s bodyguards operate with brutal resolve: they protect him not only by intimidation but through assassination, eliminating anyone who might pose a threat to his reign as the premier fighter. In the darkness of that night, Ngai Fei’s bodyguards and a squad of assassins infiltrate the Lok Fung Lin theater, massacre the troupe, and burn the building to the ground. Yee-tai, struggling with his asthma, narrowly escapes with Chang when he notices the glint of a blade reflected in the night and escapes through a window.
Believing they both perished, the attackers leave, while Yee-tai and Chang survive and seek refuge at the home of Wong Wah-bo, Sammo Hung Kam-Bo. With Wah-bo’s help, Chang finally convinces Yee-tai to teach him Wing Chun, and Wah-bo agrees to coach him in freestyle fighting. Under their guidance, Chang grows increasingly competent, though Yee-tai’s health continues to worsen.
The pair returns to Foshan for medical help, and Ngai Fei learns that Yee-tai is still alive. He visits Yee-tai, who reveals that his bodyguards have already been responsible for the killings of anyone who might defeat Ngai. In a cruel twist, Yee-tai is murdered by Ngai’s merciless guards, leaving Ngai to lament the loss of a worthy opponent—and to face the consequences of his men’s violence.
Despite Yee-tai’s dying plea for him not to seek vengeance, Chang confronts Ngai at a graveyard and, drawing on everything Yee-tai and Wah-bo have taught him, manages to overcome Ngai’s superior skill and prevail. In a final turn of fate, Chang’s legitimacy as a real fighter is earned through a hard-won mastery that emerges only after years of misdirection, brutality, and the relentless pursuit of true kung fu. The tale closes not with a flawless victory, but with the recognition that Chang’s growth came from learning to fight with purpose, restraint, and the hard-won wisdom of his mentors.
