Underwater (2020) is a gripping science fiction horror thriller directed by William Eubank, renowned for his work on films like The Signal (2014). Set in the depths of the ocean, it delves into themes of survival, fear, and the terrifying unknown, immersing viewers in a claustrophobic and tense atmosphere as the characters confront unimaginable dangers beneath the sea.

The story begins with a massive underwater drilling rig stationed in the Mariana Trench, where the crew endures extreme conditions and isolation. When a catastrophic earthquake strikes, the rig collapses, leaving Norah Price (Kristen Stewart), a mechanical engineer, as one of the few survivors. The crew members are plunged into the ocean floor with no clear path to escape. Their only hope is to trek through the perilous depths to reach a nearby drilling station that could offer safety

Alongside Norah are Captain Lucien (Vincent Cassel), Emily (Jessica Henwick), Paul (T.J. Miller), and Linh (John Gallagher Jr.), who must navigate the wreckage of the rig. They soon discover that their greatest threat is not just the collapsing structure or the crushing pressure of the ocean depths, but the strange and hostile creatures that inhabit the dark corners of the sea. As they descend further, they realize that something ancient and terrifying lurks beneath the ocean floor.

Amid the chaos, Norah steps up as a reluctant leader, still mourning the loss of her fiancé. With each step toward their potential salvation, she faces not only the physical dangers of the ocean but also the haunting creatures that pursue them. The group must come together and survive, with Norah grappling with her personal demons as she leads them through the relentless, uncharted waters toward the unimaginable horrors of the deep.