Dragon in Jail 1990

Directed by Kent Cheng Jak-Si

Andy Lau stars as a juvenile delinquent trying to escape life in the ghetto. After releasing from jail, he is bullied by a local tyrant, Ma Chao-wei, at last his jail mates help him to settle the problem. However, Ma takes revenge on him. His friendship with a rich jail mate (Ho Kar King) is his only way out!