Dear Kiki!
I'm asking you for help because I can't tell you what's wrong, and I can't even introduce myself. But it's a problem, you can believe me. The instrument has fallen into the wrong hands and I alone cannot recover it! We don't have much time, even the little time is at risk! Help me even unknown please! If you come to master Albinus's workshop, perhaps the biggest problem can be prevented!

What is this strange and mysterious letter? What kind of instrument can it be? Who is Master Albinus? How can time be in jeopardy? Who wrote the letter? And this is just the beginning... but of course it's enough for our heroes, Kiki and Gerda, to start investigating again. A mysterious lady with a hat, a red sports car, a strange shadow appear - and Gerda is taken prisoner.
The children will need all their wits, courage and wit to help and prevent the biggest trouble...
The second part of Judit Berg and Erzsi Kertész's highly successful detective novel, The Mystery of the Clock, is just as irresistibly exciting, funny and mysterious as The Secret of the Four Birds - let's go, young readers, young detectives!