Everything has led up to this moment: Quetzalcoatl's Legions of Evil face off against Leo and the forces of the Brotherhood. Will they survive? Will any of us?
The magical compass takes the gang to a strange German village where the residents never get enough sleep. Leo soon discovers why when his dreams are invaded by a nightmare controlling monster called THE MART.
When Leo brings a cursed souvenir doll on board the airship, each of his friends go missing, one-by-one. With his confidence lost, Leo must dig deep to find within himself the strength to face a strange passenger.
Leo and his friends take the airship to Mexico, where an artifact is protected by an unbeatable UNDEAD PRIEST hidden inside an ancient Mayan temple. But to defeat him, will they be willing to team-up with one of their greatest enemies?
Leo and the gang head to Old London town, where they find a conspiracy that's robbing urchins of their teeth. Is the culprit the creepiest dentist ever? Or is it something MUCH WORSE?.
The gang investigates sightings of the VODNIK, a strange water monster who steals kid's souls; but Leo, Don Andres, Teodora and Alebrije suspect there's more here than meets the eye. They set a trap to find the monster behind the monster.
With tensions high between Teodora and newest member Marcella, the airship is suspiciously taken off course to China where, after some investigating, it leads them to a mysterious CAVE OF WITCHES near the Great Wall.