It has been almost three centuries since Asdrúbal left the Dum-Dum Forest. After so long, some people think that the terrible yellow monster is nothing more than a legend. Despite the general disbelief, he is back — and eager to resume his evil deeds; in particular, to take revenge on a certain blue butterfly. In this text, full of irony and criticism, the author talks about monsters and their questioned existence — and how, even so, they spread terror wherever they go.