Synopsis
In the 1980s, troubled youth Chan Lok Kwun (Raymond Lam) accidentally enters the Walled City, discovers the order amidst its chaos, and learns important life lessons along the way. In the Walled City, he becomes close friends with Shin, Twelfth Master and AV. Under the leadership of Tornado (Louis Koo), they resist the invasion of the villain, Mr Big (Sammo Hung), in a series of fierce battles. Together, they vow to protect the safe haven that is Kowloon Walled City.