During a nighttime operation in a remote desert region, a U.S. Special Forces team led by Sergeant Kelly, Max Martini, is ambushed. In the chaos of the firefight, the soldiers are mysteriously abducted and vanish from the battlefield. They awaken, disoriented and confined inside translucent stasis pods, aboard a massive, dimly lit alien spacecraft. As they recover, the stasis pods dissolve, expelling them into a skeletal, otherworldly corridor filled with unfamiliar machinery and a quiet hum of alien technology. Exploring their surroundings, the team discovers skinned human corpses and a disturbing blend of weapons and devices that hint at a facility built for something far beyond their understanding. They are soon attacked by alien beings—tall, eyeless humanoids with armored skin, razor-like claws, and energy-based shields—forcing the group to fight through the claustrophobic passages using whatever weapons they can wield and scavenged alien gear.
The group encounters Ravi, Brianna Hildebrand, a wary young Russian woman who explains that the ship collects humans to be processed as food. She joins the team and leads them through lesser-traveled maintenance tunnels, her knowledge of the ship proving crucial as they navigate the maze-like interior. After a series of brutal skirmishes, she earns enough trust to tell them about a safe room that could offer a chance at survival. The team follows her guidance, eventually dropping down a vent into a pool of blood filled with the remains of humans, an gruesome reminder of the fate that awaits those who are found by the ship. Arguing and panic erupt before another survivor named Anya, Linda Hamilton, Ravi’s mother, appears and rescues them from a desperate situation.
Anya reveals she has survived for twenty to thirty years aboard the ship and has a plan to destroy the aliens’ communications array with explosives to prevent reinforcements. But to execute the plan, a distraction is needed, so Kelly volunteers to draw as many of the aliens away as he can. The diversion works briefly, but one of the aliens, Scars, Stanley White Jr. discerns their plan when the team triggers a motion sensor, enabling him and others to track their every move. With the group further reduced, the remaining fighters—Kelly, Ravi, Nash, Linds Edwards, and Anya—press on. Anya sacrifices herself in a final stand, detonating charges that obliterate a large portion of the pursuing aliens and buying precious moments for the others.
The fugitives reach a hatch leading outside, but Nash is killed by Scars, the sole survivor of his own squad continuing to stalk them. Undeterred, they lure Scars into an open hatch and close it on him, effectively ending the threat he posed. Kelly then finds Ravi gazing upward at an orange glow, and together they climb through debris to glimpse a ruined cityscape below. They look out in stunned silence to behold the destroyed city of Paris, a haunting reminder of the cost of their escape and the uncertain fate that awaits them beyond the ship.