Down-on-his-luck actor Price finally lands the role of a lifetime—playing Dennis, an unhinged murderer in a comeback film from once-renowned indie director Steinbeck. But when Steinbeck deems Price’s performance unconvincing and threatens to fire him, the director issues a chilling ultimatum: become Dennis or lose the role. Desperate to prove himself, Price locks himself away, practicing lines, mimicking Dennis’s habits, and sinking deeper into the killer’s psyche until he can't tell who is who.