After a traumatic car accident, a young woman named (Winstead) wakes up in an underground bunker. Her captor, or "savior," is Howard (Goodman), a stern survivalist who claims that a massive chemical or alien attack has made the outside air deadly. Michelle must decide if Howard is a paranoid kidnapper or if the world really has ended—making her stay in the bunker her only chance at survival. ⚖️ Viewer’s Guide