The film follows the story of four teen girls diving in a ruined underwater city, who quickly find themselves in a watery hell as their fun outing turns into heart-stopping fear when they learn they are not alone in the submerged caves. As they swim deeper into the claustrophobic labyrinth of caves they enter the territory of the deadliest shark species in the ocean. Discuss this with fellow SJF fans on Facebook . On Twitter, follow us at @SandwichJohnFilms Please Leave A Comment-