The book describes the life of an American who sells indian artifacts and travels to an area that the Navajo Indians call the ""Four Corners"". In this area there is a small town called Mexican Hat, which is located in San Juan County, Utah, in the United States of America. This seller of Native American artifacts is, in fact and in essence, a psychopath and a sexual deviant, a serial killer, characterized by his dual personality, sometimes gentle, sometimes monstrous. 

His father was a railway engineer, which gives him a close connection to the towns. Behind his warmth, kindness and extreme politeness, he meets people. In these relationships, his being is taken over by instincts he doesn't even know himself. However, this second personality, which is aggressive and monstrous, needs to satisfy its uncontrollable thirst for killing and to enjoy the sexual desires that are taking over its being. The telling of lies and stories is the constant strategy of his first personality, the gentle one, to get where he unconsciously wants to be. "