The gigantic golden dragon takes them to a door in the mountain. There, they discover two slots for the hearts of their medallions, keys to the Cities of Gold. They suddenly realize that the keys were lost in the first City of Gold! But Esteban has a surprise: Mendoza gave him back the hearts of the medallions before fleeing, without giving him any explanation.
They can therefore enter and arrive in a cave where there are three mysterious green cylinders covered in inscriptions. Tao discovers that they are elevators and makes them work. They are propelled to the top of the mountain and arrive in a place filled with mist. Zia asks Esteban to call the sun, but he doubts his power, and against all odds, the sun appears and makes the mist disappear.
Soon, a sumptuous City of Gold appears, nestled in the mountain. They enter it, fascinated by so many wonders. Tao asks them not to touch anything, so as not to cause a catastrophe.
Ambrosius and Tao go to explore the City of Gold on their own to try to unlock its secrets. They discover a source of liquid orichalcum, which powers a fabulous factory of Great Condors! On their side, Esteban and Zia climb to the top of the largest pyramid and enter it. The door closes when suddenly the light projections of seven sages of Mu and Atlantis appear. They encourage them to discover the seven Cities of Gold to complete their quest and return the hearts of their medallions to them.
Meanwhile, the three sailors are waiting in the snow, in possession of the pyramid of Mu, stolen before they fled. An man, resembling Zares, approaches...

Documentary: presentation of the Great Condor flying with solar energy thanks to the orichalcum.
Kokapetl's Scoop: the medallions of the children, essential to enter the cockpit.

Characters (in order of appearance): Esteban, Zia, Tao, Ambrosius, Mendoza, Kokapetl, Pedro, Sancho, Zares.

Scenario: Éric Paul Marais
Documentary: Jean-Luc François
Storyboard: Aymeric Gendre with Olivier Nal and Gaston Jaunet
Art director: Fernando Lira
Assistant director: Régis Didry, Fernando Lira