A masked figure is stalking the headquarters of the Insect Brigade.  What does he want and why does he know so much about their inner workings?
For what it's worth, the world of commoners 
refers to the normal world.
"El mundo de los plebeyos" es un 
modo de llamar al mundo normal.
El populacho es una forma 
de llamar a la plebe.
Para todos os casos, o mundo dos plebeus
 se refere ao mundo normal.