Hong Kong, 1980s. After stealing a bag of what he thought was money from the gangsters who tricked him, illegal migrant Chan flees from them and runs into the fortress town of Kowloon, a densely built neighborhood that lives by its own laws. There he tries to sell the drugs in the bag and gets acquainted with a local gang. Taking pity on the illegal alien, the leader nicknamed Cyclone pays Chan's debt and gives him a job - so the guy gets a house and friends. Meanwhile, a Kowloon real estate owner and Cyclone's named brother discovers the identity of the man whose death he has been longing for for years.