Newlywed Elizabeth (Abbey Lee) joins her brilliant scientist husband Henry (Ciaran Hinds) at his magnificent estate, where he spoils her with lavish dinners. Yet despite her new life of luxury, including the attentive treatment offered by the house staff, Elizabeth can't shake the feeling that something isn't quite right. As Henry leads Elizabeth on a dazzling tour of the high-tech property, he explains that everything in his world now belongs to her, everything except for a locked-off room he forbids her from entering. Wracked by curiosity, Elizabeth seizes her chance to investigate while Henry is away, only to be changed in ways she can't hide.