A female student rents a room in a house in the countryside where the landlady treats her as a daughter and wants her to stay forever – replacing the real, disabled daughter kept prisoner in a locked room.
Isabelle is a teen student renting a room in a house in the countryside. She’s warned by her landlady to “never walk up the stairs”. When she breaks that rule she finds a locked room upstairs. Inside the room the landlady’s real, disabled daughter sits in a wheelchair. Isabelle realizes the landlady is crazy and wants Isabelle to replace the real daughter forever.