The mysterious Hecate Hall has been operating on Greymalkin Island for more than a century - a school for werewolves, witches and fairies, also nicknamed the Damned. One of the new students, Sophie Mercer, who turns out to be a demon, takes a real survival course here, makes friends among monster hunters and eventually becomes the head of the Council of Extraordinaries. But Sophie's cousin, Isolde Brannick, on the contrary, is sent to study at a regular school. Dealing with vampires is easier for her than communicating with her peers... However, even in a school that seems normal at first glance, something incomprehensible begins to happen. An attempt has been made on the teacher's life, and Izzie suspects that there is a ghost involved. It seems that it is seriously planning to take revenge - and every day it is becoming stronger...