Twilight of the Warriors: Walled In

In 1980s Hong Kong, a troubled youth Chan Lok-kwun, a mainland refugee, struggles to survive in the Kowloon Walled City by joining underground fights. Betrayed by crime boss Mr. Big while trying to buy a fake ID, he steals drugs from him and seeks refuge in the Walled City, where he encounters Cyclone, a compassionate yet authoritative crime lord. As Chan becomes embroiled in the city's underworld, a truce of sorts is thrown into turmoil by his arrival, leading to a violent confrontation that will determine the fate of the walled city and its inhabitants.