After a group of biologists discovers a huge network of unexplored caves in Romania and, believing it to be an undisturbed eco-system that has produced a new species, they hire the best American team of underwater cave explorers in the world. While exploring deeper into the underwater caves, a rockslide blocks their exit, and they soon discover a larger carnivorous creature has added them to its food chain.
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Cole HauserJack McAllister
Lena HeadeyDr. Kathryn Jennings
Morris ChestnutTop Buchanan
Eddie CibrianTyler McAllister
Piper PeraboCharlie
Daniel Dae KimAlex Kim
Kieran Darcy-SmithStrode
Rick RavanelloBriggs
Marcel IureșDr. Nicolai
Vlad RădescuDr. Bacovia
Simon KunzMike - Caver
David KennedyIan - Caver
Alin PancRazvan - Caver
Zoltan ButucCorvin - Caver
Brian SteeleCreature Performer
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