Movie Story : Two thrill-seeking partners persuade their friends to join them in exploring a remote, uncharted cave system deep in the forests of Northern Australia. As a tropical storm bears down on the area, the group rappels into the cave's mouth, only to watch the passages begin to flood. With oxygen running low and tempers flaring, they find themselves sealed inside, and unbeknownst to them, the storm has also drawn a pack of ravenous crocodiles into the waters.