The film follows a 15-year-old girl named Ivy who was abducted as a baby and has been kept isolated in a house her whole life by her mentally ill abductor, who she believes is her mother. Ivy becomes curious about the outside world when her abductor leaves each day. When Ivy ventures outside, she is in awe of the world but also vulnerable, as she has never seen things like other people and animals before. She slowly discovers the truth about her abnormal upbringing.