After finally earning her coveted Arcanus, Isabel is ready to take her witchcraft to new heights. But it takes more than just a magical ring to cast a spell, and as she struggles to find her confidence, she'll discover that the world of magic spans farther than she could have ever imagined: from thrilling competitions to the dark recesses of the heart. Her adventures with a powerful and fierce witch, a beloved bookseller, a knight's daughter and an inventor's apprentice will challenge Isabel's core belief that magic exists to help people, as she grapples with the harsh reality that the best intentions don't always result in the best outcomes. No one knows this better than her teacher, the legendary Wisteria Amberfinch, whose own youthful journey is revealed to be a grim and perilous one.