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.
Lea is a young girl on the brink of death. She begins her final challenge, a thesis that seeks proof in the belief that happiness can be multiplied, as can the feelings of sadness, loneliness, and misery. Unfolding the research, she disc…