 Serafin is a happy and good-natured little angel, although he does have one slight flaw: he is very mischievous. One day, he manages to get into deep trouble and is sent to Earth to learn to be a Guardian Angel. When he arrives in Mexico City, he is really frightened and, not knowing what else to do, he finds shelter-and unexpected help-in an old abandoned house. A boy named Pepe lives in this city with his mother Carmen, his grandfather Joaquin, and his stepfather Raul. Carmen is a hard-working young woman who loves her son dearly and does her best to give him a decent life. Raul, on the other hand dislikes and mistreats him. Grandfather Joaquin is an inventor who creates all sorts of gadgets in his laboratory in his attempt to improve his family s financial condition. In spite of all his problems, Pepe is a very happy little boy because he has a fantastic group of friends. They are Guampi, Cachito, Pancho, Tomas, Risitas and Edy. They have boys-only club that Lulu is anxious to join. Together they have many thrilling adventures and are always happy. That is, until one day a mysterious and his two sidekicks, Roque and Anibal, move into the abandoned house. Nobody suspects that this man is Lucio Fernandez, an agent of evil. His mission is to wipe out every last trace of love from the face of the earth, and he is prepared to destroy any angel or child who dares get in his way, since they represent innocence, friendship and love.