The Wickwood sisters have been living in poverty and oblivionfor years. Their family was once prestigious; the Wickwoods were the great Royal Occultists, a title as grandas it was mysterious. But ten years later, all that is left isMedora and her sister Allegra, forgotten by all. Medora steals to try and survive, while Allegra tries to unlock the secrets of the occult. Leftto fend for themselves at a young age, they were never trained orexperienced the Transmission, the final stagebefore learning the secrets of the occult. So, Allegra tries to cast spells and make potions... without much success. The sisters are a little strange and intimidate everyone. Except their neighbor,Cornelius. Although he isafraid of the hot-tempered Medora, he loves spending time with Allegra, sometimes forgetting that she is a ghost and that she died years ago.Then, one day, he brings them a letter that changes everything: a royal summons. All the words in the Book of Dark Worlds(the occultists’ grimoire) have disappeared! If the sisters can solve the mystery, King Aloysius promises to restore their family’s name and make them Royal Occultists once again.Desperate to escape frompoverty, the sisters set off in search of the book, but they are about to discover far bigger and more personal secrets. Their quest turns out to be a search for their own identity, during which they uncover terrible secrets about the Wickwood family. And their whole world may come crashing down...