Flori and Lucy are on holiday in Turkey. By accident they meet their class mate Ali, who is visiting his grandfather. Ahmet, a genie, sends the three kids on a treasure hunt near an old castle. They find real jewels and the hunt turns into a real adventure when it becomes apparent that a German gangster duo is looking for the treasure as well.

After a cunning escape from the boarding school, Oliver and Peter find their way to the back parts of Gastein Valley, where they fall into the hands of the paranoid Professor Niedlich. He gives the boys compulsory lessons, far worse than at school.