Cave, The (2005) - Synopsis

Cave, The (2005)Deep in the Romanian forest, a team of scientists stumbles upon the ruins
of a 13th century Abbey. On further inspection, they make a startling
discovery ? the Abbey is built over the entrance to a giant underground
cave system. Local biologists believe the cave could be home to an
undiscovered eco-system, so they hire a group of American cave-explorers to
help them investigate its depths.

JACK (Cole Hauser) and his brother TYLER (Eddie Cibrian) are thrill-seeking
professional cave explorers who run a team of the top divers in the world.
They arrive in Romania with all the latest equipment, including a new type
of scuba tank allowing a diver to remain submerged for up to 24 hours. The
crack unit, which also includes Charlie (Piper Perabo) and Buchanan (Morris
Chestnut), immediately begins their exploration. But what they find deep
inside the caves is not just a new eco-system, but an entirely new species
altogether ?