Jason Walk (Robert Forster) is a part-time cabbie and small-time numbers runner on the seedy fringes of Hollywood. When he agrees to help a woman (Nancy Kwan) kill the drug dealers who murdered her son and husband, Jason finds himself hunted through a deadly underworld of pimps, players and sadistic killers. As the violence hits closer, Jason hits back with a plan that puts him far out of his league ... and dangerously close to the edge.