Every year, in the magical town of Vmeyvoron, witches take part in the Black Moon ceremony. And twelve-year-old Sim can\'t wait to join the most powerful coven and become a full-fledged witch. She has done everything she can - she\'s been studying for her exams and attending all the witchy social events. But on the night of the ceremony, the thing she feared most happens in front of the whole town... The only way out of this situation is for the witches to unite and succeed together. Then their coven will gain strength, and if not, they will turn into frogs forever. Can friendship become the most powerful magic?