Sam 'Mad' Carew is bored. So when a beautiful woman asks for his help, he's only too happy to help. Her father, Kevin Kilppatrick, has been locked up for violent murders she believes he didn't commit.
A recent spate of similar killings convinces Sam she may have a point. However, he doesn't bargain on getting mixed up with one of the most ruthless and sadistic crime families in the country.
Sam soon realises he'll have to come face to face with the killer - the elusive and aptly named 'Hammerhead' - in order to knock this one on the head.