Bibi is absolutely thrilled: the big witches' congress on Blocksberg is coming up! Of course, she wants to be there as an assistant, together with Schubia and Flauipaui. But as soon as the first witches arrive, everything goes haywire: spells end up in confusion and the whole witches' congress gets out of hand! Now the young witches need courage and imagination to stop the chaos and save the future of the witches' world.