Sofía, an insecure young nanny who starts her new job taking care of two problematic kids. When their parents leave her alone with the children, they become victims of a demonic entity obsessed with playing children's games.
The lives of two sisters change dramatically, since they were hypnotized by a mystical vinyl record from the 1970s.
A nun performs an exorcism on a pregnant woman which turns out to be unsuccessful. Unfortunately, the evil returns.