Ah Lung is a decent law abiding citizen armed with deadly martial arts skills. He soon discovers he has a brother who is a gangster, Man Ho. All martial hell breaks loose when he tries to meddle in the gangs affairs.

Bruce Le stars in this South Korean action film that revolves around some stolen microfilm and a mute beggar with questionable fighting and social skills. Bruce’s character, who seems to go unnamed throughout the film, has turned mute as a result of a traumatic childhood and an abusive boyfriend of his mother. He also has taken on the persona of a cat, communicating only in yowls, growls and caterwauling. He is quite taken with a woman whose boyfriend is a secret agent in possession of important microfilm and is on the run from the mafia.

It's approaching World War 2 and China is expecting to be invaded by Germany and Japan. Mr Ang is hired by a Chinese group who are after a "secret document." Many other groups want to get their hands on it as well. It's on the top floor of a tower and Ang must fight his way to the top.