Leo, Teodora, Don Andrés, Alebrije, Evasito, Finado and Moribunda must stop the Chupacabras from wrecking havoc.

Leo San Juan was imprisoned after being mistaken for a rebel insurgency by the royal army while on his way home to Puebla. But when a mysterious flying monster, known as the Chupacabra, is on the rise, attacking prisoners and guards, he must defend his fate and fight the flying monster.