Ben and Semir are walking in unknown territory: traffic education at primary school. And as if the third graders weren't difficult enough to tame, they come across a suspicious trail at school that leads them to a gang of serious criminals. The alarm bells ring at Semir and Ben: Are the crooks planning a devastating attack? What are you doing at primary school? And what role does the quick-witted teacher Silke play, in which Ben has found more pleasure than he admits? Events overturn when suddenly the school bus is kidnapped with the entire class. Ben tries in vain to prevent the kidnapping and instead falls into the hands of the criminals. Now Semir is on his own in the investigation, but when he realizes the whole dimension of the crime, he knows that an unexpected catastrophe must be prevented. He is helped by an old acquaintance: conspiracy theorist Sturmi ...