Thick air in Rocky Beach! A shopping and meeting center is set to be built on the grounds of the late magician Aden Tangury. For some time now, his fans have been gathering to protect the house from demolition. But it's not just the protests that are delaying the construction work. The three ??? have a new case and soon a hot lead: What do the incidents have to do with the legendary shows of the magician? Tangury is said to have transformed into a giant barracuda back then. With wit and intelligence, Justus, Peter, and Bob uncover what is really going on here.