Sonia wanders around the gloomy mansion where she lives, obsessed with unraveling a dark hidden secret. Her past, her fears, her desire and her terrible nightmares have created a deadly web in which she is trapped, taking her away the little sanity she had left. Sometimes killing time is not such a harmless thing.

Lucía starts tonight as a Call TV hostess on the worst night of her life.

Professor Jorge Ollot and Dr. Iris de Miguel have gathered a group of people, carefully chosen, with whom they will be isolated for a week in a secluded house. Their intention? To demonstrate that the paranormal exists, but that it is our own mind that provokes it.