Roberto (8) is a shy young man and a fan of adventure comics. His brother Lalo (10), on the contrary, is a lover of weapons and real adventures. Both arrive with their entire family to visit their grandfather who is evicted. Before dying, the grandfather asks them for a secret task: When he dies, they must free his beloved horse before they sell it, he assures that his soul will be free with the horse. The next day the grandfather woke up dead, the children secretly free the horse in a field, but Infausto, a tattooed man with a fearsome appearance, steals the horse to take it to the circus where he works. Lalo and Roberto decide to sneak into the circus to try by all means to recover what they have lost, even if this endangers their own lives.