Filemón Pi, or "the guy with the two hairs" referred to by passers-by, is a former head of a private detective agency and current secret agent for the TIA. Together with his assistant Mortadelo, he has participated (and continues to do so) in a multitude of cases, each more picturesque, from which he never comes out well. It's time to meet the other member of the most famous comic duo in Spanish comics.