The unveiling of a statue honoring Emiliano Zapata becomes the site in which the demands of a struggling city are manifested through the speech of a young boy.

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.