In an old attic, three boys: Erdal, Kiwi and Buwi dream of finding Bumbumlandia, the land of children's happiness. They need the mysterious statue in the possession of friendly pirate Captain Morgan. They set off on a journey.
The boys find the entrance to Morgan's grotto. In one of the rooms there is an alchemy workshop. Inadvertently, they turn on the time machine that takes them and Condor to the medieval period, where they become knights of Sir Ementaler.
Condor, instead of hiding the statue, as Morgan ordered him, loses it. Afraid of the consequences, he falsely blames the boys for stealing the statue. Meanwhile the boys fight a duel with Sir Ementaler and his horse in the tower.
