An underwater research facility 11 thousand meters under the sea. There is the team of aquatic researchers formed by Norah (Kristen Stewart), Paul (T.J. Miller), Rodrigo (Mamoudou Athie), Emily (Jessica Henwick) and the captain (Vincent Cassel) of them all. After being devastated by an earthquake, the crew has to decide how to survive. They decide to walk along the bottom of the ocean until they reach a distant station. But as they go they realize that strange marine predators are determined to kill them.