Four teen girls diving in a ruined underwater city 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.

Marissa Cortez-Wilson is happily married to reality TV star Wilbur Wilson, and is stepmother to his two children, Cecil and Rebecca, along with their newborn baby. What her family doesn't know is that Marissa is a retired secret agent, and when The Timekeeper -- a dastardly villain threatening Armageddon -- strikes, Marissa is called back into action. With the fate of all mankind at stake, Marissa is forced to seek the help of her stepchildren, and,...