During a conference, held at Miskatonic University, Arkham, Massachusetts - United States, addressed to students and professors of the institution, where the successful writer and businessman, John Howard Brown, will be presented, who will talk about his recent book, he will end up getting to know to Miguel O'donojú, a young accountant, who has inherited the notebook from his late grandfather, Aaron Cedric O'donojú, whose discoveries haunt the insane existence of monstrous creatures associated with terrible and primordial events that occurred in Innsmouth , Dunwich, Paris, London, among other places and various times; where the appearance of a mysterious being predominates, wrapped in dark robes, with his face always covered, comparable to a desert dweller, known as the Dark Monk.