Perry Frank assembles a team of four young scientists to take part in an experiment to reanimate the dead: Devin Fischer, Carter Watts, and Ampersand Garner. The project is funded with a strict limit: they only have budget for five subjects, so the work must move forward slowly, carefully, and with meticulous documentation captured in taped interviews that Perry arranges. As the cameras roll, the group projects warmth and optimism, even as each member wrestles with the gravity of what they’re attempting. Devin opens up to Perry about the shadow of his father’s legacy—how his own father, a scientist, longed to finish work that others would complete later—and explains that he wants to push this experiment to its limits.
Their first subject is an insect, chosen as a cautious starting point. The initial result is a failure, prompting Devin to suggest that the study should pivot away from insects since the design is built around mammals. Perry reluctantly agrees, and Amps recalibrates the equipment for a mouse. Carter, who had been supportive at first, grows hesitant when it comes time to kill the mouse, and the group refuses to let him name the creature. The test again ends in disappointment. Carter and Devin decide to pause, but Amps convinces Perry to give the experiment a second chance on the same subject. The second attempt also fails, and Amps is left demoralized. Later that night, Carter discovers the mouse’s body has moved on its own, a small moment of thrill that the others celebrate. He privately worries aloud that someone on the team might be manipulating the situation to raise morale, but Perry insists he has the situation under control.
As the failures pile up, frustration mounts. Devin urges Carter to contact the grant organization to secure more funding, hoping for a way to continue testing. Carter’s discovery that there is no grant—Perry has been funding the project privately—sparks a rift: Carter resigns due to legal and moral concerns, though Devin chooses to stay. Perry and Devin decide not to tell Amps about the funding deception. With the mammal test proving slow and uncertain, Devin presses to test a larger subject, arguing that a rabbit would be easier to handle if they can avoid attracting public scrutiny by staying away from animals larger than a rabbit. The rift widens when Perry learns that Devin has joined the project for a deeply personal reason—his sister’s illness near death—and he intends to use the revival to bring her back. Perry bluntly reminds Devin that human experimentation lies beyond the realm of possibility.
After some encouraging signs, Amps’ updated calculations reveal a troubling discrepancy: the mouse could not have moved on its own in the way they observed. Perry confesses that he moved the mouse himself to keep morale up, and Amps asks for time away from the project. Devin pushes Perry to run a test without Amps present, and they finally achieve a genuine breakthrough—an unqualified success. Perry reaches out to Carter to apologize for the grant deception and asks him to return, which he does after hearing about the progress. Devin, meanwhile, continues to press for progress—and secretly convinces Amps to run a test on a human subject.
When Perry learns of Devin’s plan, he warns that the police will be called if they proceed. Faced with no other option, Devin chooses to take his own life to force them to test the machine on a human. The procedure initially seems successful, but the horror comes quickly: Devin’s memory and personality have been erased, leaving him unable to speak and scarcely able to understand what is happening around him. Realizing the catastrophe, the team decides to destroy the equipment and depart the lab, with Devin in tow toward the outside world. As they place him in a car, Devin stares out with wide, uncomprehending eyes at a world that no longer feels like his own.
