After its great success of late, the Grandhotel 17 Waves can hardly save itself from guests. Fashion designer Karl Catterfish has also booked in with his models to present his new collection in the city. But then Karl Catterfish is robbed! A valuable family ring has been stolen from his room. And he is not the only one affected: the models and other guests are also missing things! And it gets worse: the main suspect is none other than the good-natured squid lady Onda. Smeeralda and her friends are convinced that Onda could never be a thief. To prove her innocence, they set out to find the thief on their own.
A feel-good series for girls aged 8+ - dive into underwater adventures with Smeeralda and her best friend Azuro, evil Water Witches, and a run-down but charming Grand Hotel.