Young Ana spends her days observing adults through keyholes in a sprawling seaside villa where her grandfather's body lies in state. She witnesses her parents in graphic, aggressive intimacy and steals a pocket watch from her grandfather's corpse, triggering a nightmare pursuit through the darkened house by a veiled servant and a silent, black-clad figure. Years later, Ana adolescente walks through a coastal village where predatory glances from local men disrupt her quiet outing. As an adult, Ana adulte returns to the abandoned, decaying villa where black-gloved hands emerge from empty bathtubs and a relentless stalker forces her into a violent, razor-driven confrontation.