In the mid-nineteenth century, in a small Venezuelan town, Father Giovanni and a scribe write the story of a supernatural case that they have witnessed, it is the story of a mysterious spectrum, which the townspeople have baptized as “El Silbón”. At the present time, we know a family made up of Gabriel and Mayra, Ana’s parents. Gabriel suspects that his daughter is possessed by the devil since she is trying to kill him. Gabriel asks the parish priest for advice, which is the same one in which Father Giovanni wrote about Silbón more than a hundred years ago.