When Ernst and Bobbie visit a fantastic circus school, disaster strikes. The circus school burns down, and to save it, Ernst and Bobbie must track down a great treasure. As they follow a treasure hunt that leads them to the strangest places, the circus director is also kidnapped. Pursued by the criminal Fedor and his innocent niece Indy, they face thrilling and dangerous adventures...

Ernst and Bobbie are enjoying a well-deserved vacation when they discover that a beautiful nearby forest is about to be cut down. The villainous entrepreneur Wolter Onix wants to build an asphalt factory on the site to pave all of the Netherlands. But Ernst and Bobbie are determined to stop him so Onix challenges them to complete some tasks. If they succeed within three days, he promises not to build the factory. Their mission: bring together a famous pop star, 40,000 concertgoers, and a golden microphone. It seems like an impossible task, but Ernst and Bobbie are determined to save the forest...

Ernst and Bobbie get the chance to move into a castle where they have to guard a precious treasure...

Strange things are happening at the North Pole. The fish are disappearing from the waters, and as a result, the seals and other animals are leaving the area. Egbert de Vries, a kind man who lives at the North Pole, calls in the help of Ernst and Bobbie. They set off to investigate — and along the way, they find themselves in one hilarious situation after another!

By an unfortunate twist of fate, Ernst and Bobbie end up on a giant cruise ship. The captain seems to have disappeared, and of course, Ernst and Bobbie set out to find him. But then they discover that a villain is on board! Their search leads them to a tropical bounty island — where the captain is hiding...