How many times have the two private detectives Kalle and Gitta been on the move in search of the truth! Now the master detective duo has three tough new cases to crack once again:
Don Tamasi the Forger manages to escape from prison – and, of all times, just a few days before the warden, Normeckel, is about to celebrate proudly his 20 years in the service!
The circus director, Emma Mieselbeck, can also do without the publicity generated by a series of acts of sabotage that are threatening to drive her circus to the verge of ruin. After all, who wants to go to a circus where hardly any performers will appear because someone is deviously destroying all their props?
And then, last but not least, there’s the instrument you’ve never heard of, the humdoodlephone, which Stölke Pfitzhauer invented and which disappears before he can demonstrate it to an admiring audience.
Definitely an open-and-shut case: what this calls for is a keen mind, sharp eyes, excellent powers of deduction and a good memory!