 Believing that his father's "Fierce Tiger Climbing Mountain" to be the strike that had killed Master Duen, Kuen refuses to re-learn Bajiquan, and seeks help from his neighbour Thai Por, a retired master in Wing Chun and Muay Thai.Kuen is a quick learner, and immediately adapts to Thai Por's fighting style, and uses her moves to defeat his enemies.After defeating underground Muay Thai champion Lung Shing-fu, who is also Thai Por's son, Kuen and Fung form the Kowloon Walled City Welfare Association to break the Fellow Association's stronghold in the walled city.