Up nextIncógnita and Bucle meet Mala Espina, and unwittingly join forces with Radical Libre and Mnemotecnio to thwart Dr. Dogma’s plan to destroy the Ciudad Corteza Library and thus control the truth through machines that would reproduce questionable versions of the books left behind in a fire. In this adventure to protect knowledge, the team discovers the value of independent thought, that questions and curiosity are stronger than any deception, and that there is Cuestión, a misterious object whose power unsettles them.