A flying orchestra? But orchestras can't fly, can they? Or maybe they can? The witch has a brilliant idea: they will travel to the grand concert on flying brooms during Walpurgis Night! However, no one expected Knürsch, the perpetually grumpy gnome who lives deep in the concert hall's basement. Because he has to build ninety brooms, his mood worsens, and he does his best to sabotage the concert trip. And indeed, everything goes horribly wrong. The orchestra always ends up where it never wanted to be: in the wrong place and at the wrong time. Not even the violin-playing witch and the maestro on his first-class luxury broom can prevent this. But incredibly! The flying orchestra meets Tchaikovsky, Bach, and Mozart himself! Will they manage to perform at the international witches' party after all?.