Two young armed thugs break into a shabby terraced house full of mischief and threat. This is not the home of any ordinary old man. This is the home of Frank who is 75, and outwardly vulnerable in a world where traditional social values are slowly being eroded. Mad Frank is a man still very capable of savage violence and relentless principle. These qualities caused him to murder people and spend many years in prison,. He spent his working life as one of the most aggressive villains the world has ever known. Frank still has his wits about him, and it quickly becomes evident that two young armed thugs are no match for him.. Mad Frank is based on a real person