It is known as S-11, a diabolical hybrid of shark and octopus created by genetic scientist Nathan Sands (Eric Roberts) as the U.S. Navy's next super-weapon. But when its control implants are damaged during a training experiment, the beast escapes to Puerto Vallarta, Mexico for a taste of sun, sand, bikini babes, jet-skiers, spring breakers and beyond. Now, a hotshot mercenary, an investigative reporter, and Sands' biomechanical engineer daughter must stop a creature like none ever witnessed before: it has superior intelligence, attacks without warning and it likes to snack on bungee jumpers.