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.

Cast:Cole Hauser, Lena Headey, Morris Chestnut, Eddie Cibrian, Piper Perabo, Daniel Dae Kim,

Genre:Action, Adventure, Horror, Thriller,

country:Germany, United States of America, Denmark, Romania,

Production:City Productions, Cineblue Internationale Filmproduktionsgesellschaft, Lakeshore Entertainment, Screen Gems, Cinerenta,