After the death of their father, Edgar and Erica inherit the family business of hunting paranormal creatures. Carlos calls them because a warlock has been haunting their house. After capturing him almost by luck, the siblings fight. After remembering her father's last words, Erica returns to Edgar, managing to reconcile and stop the warlock.
In 1983, César de Grajales, the expert paranormal hunter, announces in a TV commercial his new invention: A telephone to talk to beings from beyond. During the demonstration of his invention, César makes contact with former president Plutarco Elías Calles.