In the 1980s, gangs were entrenched in the Kowloon Walled City, the notorious "Three Don't Care" area, and there were dangers. A young man in distress came in by accident because of escape, but unexpectedly gained brotherhood here. At the same time, the evil gang, which had been coveting the city for a long time, launched a fierce battle to seize the village, and a passionate battle to defend the village broke out immediately! This film is based on Yu 'er's original novel "Kowloon Walled City".