After years of suffering from a sleep disorder, Asunción turns to a specialist who will help her discover the causes of her insomnia.

Pablo Kramsky, a crime reporter for a tabloid newspaper is the victim of a home invasion. A colleague offers him a gun for self-defense, and this leads Kramsky to kill a person when he feels endangered. Kramsky is not brilliant at his job, but when he writes an article about a possible vigilante taking justice into his own hands, he gains the recognition of his superior and the admiration of his coworkers. Thus, Kramsky repeats the formula, committing crimes and writing about them, creating a crime fighting national hero.

Though it sounds incredible, little Ulises with only nine years old, from one day to another grows an enourmous mustache. This situation, appearing to be ordinary, starts a series of extraordinary events for him, his mother and his best friends. From this moment onward with the company of a bunch of very curious characters they will have to face this hairy adventure.

When a magical artifact is lifted from his library, a meek librarian sets out to ensure its safe return.