The first adventure leads Belle, Connor, Oni and Oli on the trail of the privateer, explorer and ACE founder Bartholomeus van Robbemond. The most precious possessions of the ACE are stolen from the secret archives of Deep Fog Castle: The Fire Tiger, that dangerous magical dagger that Robbemond and his loyal companion Jopie once discovered in the jungles of Batavia. With their ‘borrowed’ supersonic zeppelin, its know-it-all control computer TICI and a teacher that’s accidentally dragged along for the ride, the four chase the thieves into the Indonesian jungle. They soon make a sensational discovery - but can they also prevent a shady criminal organisation from activating the destructive power of the Fire Tiger?

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