In a post‑apocalyptic world devastated by a plant‑based virus that transforms humans into resilient, zombie-like hybrids, Ethan—a young man plagued by severe headaches and memory loss—clings to the hope of reuniting with his missing girlfriend, Emma. In the early days of the outbreak, Emma, an ER doctor, had fled with Ethan toward a remote cabin, but she soon disappears without a trace.

After a disorienting encounter in which armed strangers open fire on him, Ethan is rescued by Mae, a hardened survivalist who takes him to her secluded farm. Despite Mae’s stern exterior, she cares for Ethan as he desperately searches for Emma. During his journey, Ethan ventures away from the relative safety of the farm, including a trip to the abandoned cabin where he finds only a frightened woman and her teenage son instead of Emma.

As fragments of his lost memories begin to return, Ethan gradually uncovers a harrowing truth: he is already infected by the virus, slowly morphing into one of the undead. In a shocking twist, it is revealed that the woman he has been seeking—Emma—is in fact Mae herself. For years, Mae has maintained Ethan’s tenuous existence by feeding him human flesh from a steady stream of unwitting visitors, ensuring that he remains only marginally human despite his zombie-like state.

Confronted by this grim reality, Ethan attempts to end his suffering by shooting himself in the head; however, he soon discovers that, like all of the infected, he cannot die. Mae, overwhelmed by the cruelty of their fate, confesses that she “can’t do this any more” and ultimately allows herself to be mauled by Ethan. In the film’s ambiguous final moments, the two rise from the wreckage holding hands and walk into the sunset, leaving their ultimate destiny unresolved.