"Humans disappeared from the planet, pigeons took over the Earth's surface. Rats founded the Underworld, where the latter breed tarantulas and cultivate lichen. After fleeing Bosco La Mitraille and Sammy Sans-Def, her two suitors, the beautiful Penelope, wonders about her future. At the bend of a pipe, she overhears the conversation of brigands who are plotting a smoking gun. That's all it takes for Penelope to embark on a quest for justice in the guise of Justicia, a superheroine at the service of the most disadvantaged." --