Belén can’t sleep. For weeks now, every time he manages to fall asleep, he wakes up with increasingly strange dreams. She lives alone, after a family fight made her decide to separate from her parents. During her therapy sessions, Jonathan, her psychologist, suggests that these nightmares probably stem from the problems she had in the past with her family, but while investigating, Belén begins to come across esoteric and demonic theories, which suggest that some kind of entity could has gotten into your mind and that could be what prevents you from sleeping peacefully