When an evil genetic-engineer, Dr. Paradigm, illegally experiments with an untested DNA genetic formula, four brothers are accidentally transformed into monstrous half shark - half humans! Delighted with his success, the diabolical madman seeks to alter nature and tailor all humanity into sea creatures of his own design and control! The Bolton brothers - John, Bobby, Coop and Clint - team up to stop Dr. Paradigm and his deadly Seaviates from transforming the citizens of Fission City into mutants with no free will. So hold onto your fins as the heroic Street Sharks kick some serious fin as well as satisfying their voracious appetites.