The movie starts in Hell where Satan plans to destroy Christmas by stopping Jesus's birth, and he decide to send three of his minions - Astarotte, Scarapino and Farfaricchio - in Naples from the barrel of Mount Vesuvius since it was the "Crib's capital". The three devils choose a little kid called Rocco, which is unhappy and jealous for the incoming birth of his little brother Francesco, and he's always angry with his mother and father.