This simply cannot be, but nevertheless it is! It turns out that the old watchmaker Petka met, an eccentric who makes interesting wind-up dolls, is in fact an insidious and cruel magician, eager to own human souls. It is he who sends out forgotten childhood fears, it is his mechanical monsters that turn children into real zombies. “How to defeat the damned sorcerer?” - Petka and his friends ask themselves and can’t find the answer. But one day a mysterious Stranger in Black appears before them...