As no great witch wanted to make Petronilla her apprentice, she had to fend for herself. It became an ingredient merchant on request. She must now fulfill the orders, in addition to taking correspondence courses in witchcraft to learn how to use her magic. When Merlande, the enchantress of brooms, needs bat hair for a potion intended for Baba Yolanda, Petronilla offers his services. However, the bats of Berg-ßa-mottes are far from engaging and Petronilla has less than twenty-four hours to accomplish his mission... Will it be able to rise to the challenge?