Miguel Moreira, also known as Tibars, also known as Djon África, learns that genetics can be cruel when his physiognomy - as well as some of his strong personality traits - denounce him, straightaway, as his father’s son; someone he has never known. This intriguing discovery leads him to try to find out who this man is. All he knows about him is what his grandmother, with whom he has always lived, has told him.