Avelino Chillarón was 12 or 13 years old when he realized that his surnames and those of his cousins didn't match, so he decided to ask his uncle. This is how he learned that, although his father and aunt were siblings, they didn't have the same father, so he and his cousins didn't share the same grandfather. In this way, Avelino realized that there was a part of his family he didn't know. The protagonist of this story feels partially mutilated from a part of his family history, a part that was taken away from him by a regime that established, over the years, a long period of widespread social amnesia about a series of corpses and missing persons throughout the spanish geography.