Underwater (2020) is a claustrophobic sci-fi survival thriller that plunges viewers into the terrifying depths of the ocean. Kristen Stewart stars as Norah Price, a mechanical engineer working on a deep-sea drilling station that is suddenly devastated by a massive earthquake, forcing the surviving crew to escape through the pitch-black ocean floor.

Stewart delivers a gritty and emotionally grounded performance, portraying a woman pushed beyond her limits as she becomes an unexpected leader under extreme pressure.

Vincent Cassel brings intensity as the haunted and obsessive captain whose obsession with the mission adds tension to the group, while Jessica Henwick and John Gallagher Jr. provide youthful energy and emotional vulnerability as crew members struggling to survive.

As the survivors trek across the seabed in fragile diving suits, they encounter unknown and monstrous creatures awakened by the disaster. Directed by William Eubank, the film builds relentless suspense through crushing water pressure, limited oxygen, and sudden attacks, blending deep-sea horror with cosmic terror in a race against time where every step could mean death.