The story starts in Barcelona where inventor Feodor together with his brother Ramon are building a flying machine in their own workshop. When Ramon is kidnapped by the inquisition, Feodor travels on his traces. He gets kidnapped by corsairs, falls in love with the daughter of a corsair captain and discovers the real reason why the Grand Inquisitor has captured Ramon. During his adventures he visits Almeria, Malta, Tripoli and finally the mysterious Zerzura.

The story starts in Barcelona where inventor Feodor together with his brother Ramon are building a flying machine in their own workshop. When Ramon is kidnapped by the inquisition, Feodor travels on his traces. He gets kidnapped by corsairs, falls in love with the daughter of a corsair captain and discovers the real reason why the Grand Inquisitor has captured Ramon. During his adventures he visits Almeria, Malta, Tripoli and finally the mysterious Zerzura.