Finally: the long-awaited fifth volume of the bestselling series! Oh dear, Rico and Oskar have fallen out! And just when the existence of their playground is at stake. Oskar senses a criminal case, but now he has to solve it all on his own. Because Rico (firstly) isn’t speaking to him anymore, is (secondly) in love for the very first time, and has (thirdly) to go to Hesse, but that’s a whole different story. Their friends desperately try to reconcile the two – without success. But only if they work together can they solve the case and save the playground... "Andreas Steinhöfel's stories not only bring incredible joy to the author.".