The Cave

In the forests of Romania, a team of biologists discovers a vast underwater cave system beneath the ruins of a medieval abbey. Believing the isolated network contains an unknown ecosystem and a species that has evolved there, they bring in American cave divers led by Jack McAllister and joined by his brother Tyler. Their expedition takes a dangerous turn when a rockslide seals the route back to the surface, leaving the team trapped below with a large carnivorous creature that begins hunting them.