Anna begins receiving threatening messages and feels she is being stalked. During a night out with friends, she feels someone touch her hair but sees no one when she turns around. Later at home, she finds a disturbing message written on her bathroom mirror and grows increasingly paranoid that someone is following her. In the climactic scene, Anna thinks she sees a figure outside her kitchen window at night, but when she turns away it is revealed the stalker has pressed his hand against the glass, breathing heavily while watching her inside the house.