Beatriz, a young psychiatrist, takes a job at a prestigious sanatorium that specialises in hypnosis. There she meets a young girl who has witnessed a brutal murder, but before she is able to help her, the girl is found dead. As Beatriz gets drawn further and further into this terrifying web of secrets, and reality and fiction begin to merge in her increasingly unstable mind, one thing becomes painfully clear... Beatriz is the next in line to die.