In Detroit, Janet Slate is happy since she has just rented the apartment 1303 of the Lake View Residence and will leave her alcoholic mother Maddie Slate. She calls her sister Lara to tell the news and she meets the girl Emily, who is her next door neighbor. Emily tells her that a girl, Jennifer, has killed her mother many years ago and jumped off the balcony, committing suicide. She also tells her to leave the apartment. Janet hears strange noises in the apartment and she calls her boyfriend...