Every day after school, Juan Brum entertains himself by imitating his favorite comic strip characters. One day he shows up at the publishing house Libra, which publishes the comic strip Cormack, his favorite character, looking for work. His tasks at the unusual publishing company lead him to the most isolated places and individuals in the building, until one day he is charged with a special mission: to deliver a package to Sanders, the legendary seeker of endings.