Bestselling author Martin Muser with his first children's thriller Miro and Pola are best friends. Stupid Linus says they have a crush. But that's not true. Pola finds normal school boring. She would much rather be at a detective school! But when the big school trip comes up and daft Linus suddenly disappears, things get really exciting at Pola's school. Because Miro and Pola uncover incredible secrets. Watch out, watch out, watch out: The investigations carried out by the newly-formed Schurkenschnapp-AG would make any inspector green with envy!