Tells the story behind an assassination attempt perpetrated in 1897, by a dipsomaniac man, against the President of the Mexican Republic, General Porfirio Diaz.

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.