When an evil genetic engineer, Dr. Piranoid 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! So hold onto your gills as the heroic Street Sharks kick some serious fin as well as satisfy their voracious appetites.