Nacho Nieto, a journalist specialized in the paranormal, is going through his worst professional and personal moment. After a failed suicide attempt, he returns to life accompanied by the ghost of his mentor, Dr. Estrada, a mythical communicator of mystery, who died more than twenty years ago. Together they will have to unravel the mystery of a 'poltergeist' that harasses a mother and her son in a house in the center of Barcelona, perhaps the most important paranormal case in recent years and the one that could return Nacho to the podium of mystery journalism. . But Nacho must in turn overcome the weight of a dark secret from his past, as well as his own internal ghosts.