"Someone in this class is a witch," said the anonymous note passed into Mr. Crossley with the geography homework. Everyone in 6B knew about the note, but only the headmistress of Larwood House knew which of the pupils were witch orphans. Any one of these orphans might have inherited the magic from their ancestors, and they were just at the age when these powers would make themselves known. 6B was nervous. If the note was true, then someone in class could be burned at the stake-unless they could conjure up the old magician Chrestomanci to save them.