After research scientist Dr. Sands (Eric Roberts) and his daughter, Nicole (Sara Malakul Lane), develop an electrical-implant-controlled hybrid shark/octopus for use by the government as a classified naval weapon, the creature breaks down and goes on a homicidal spree. As the animal chomps its way through the resort beaches of Mexico, Dr. Sands tries to convince a retired colleague to help him and Nicole stop the carnage.