A story of mistaken identity... A story of love, lust and power... A story of guns, and men who use them...

Miami 1980, a doctor transplants a metal object into a patients arm. He tells him to go home and relax, but soon the patient kills the doctor. One year later, Prof. Arlington is kidnapped by thugs and taken to a secret location. Awesome action ensues.

The titular "Mad Dog", actually goes under the very anonymous name "Nick Nolte", and is played by Romano Kristoff, whom you may or may not remember from such classics as "Warbus", "Double Edge", or "Tough Cops". He is a cop who doesn't take it easy when the mob executes his stripper-sister, and he goes after them to get revenge at all costs. Another Phillipino superstar, Jim Gaines, has a small cameo in "Mad Dog II" as a snitch who gets offed in the bathroom.

Special effects producer Steve Baker will help a woman being chased by the Mafia, but then they followed him and his wife.

Jack Kaplan is a US Army Soldier and Weapons Expert liberated by a "rescue team", he returns home to the United States only to find out that his wife Diane has been captured by infatuated gangster Duffy Collins. Kaplan embarks on a mission to find his wife, running into characters like Digger, Man With The Golden Hand, and the treacherous femme fatale Eve. He is a man on a mission.