The story begins when Diana, while researching in the Bodleian Library at Oxford University, unexpectedly discovers a mysterious and ancient manuscript, Ashmole 782, which contains the secret history of witches and magic. The book is highly coveted by witches, vampires, and demons alike, each eager to control its power. Diana’s discovery of the manuscript triggers a chain of events that forces her to confront the truth about her own magical abilities, which she has been denying for years after the traumatic death of her parents, both witches.

In addition to her academic life, Diana’s path becomes entangled with that of Matthew Clairmont, a vampire whose family has long sought the manuscript. Initially wary of each other due to their species’ long history of conflict, Diana and Matthew form an unexpected bond that quickly evolves into a passionate romance. As they delve deeper into the secrets of the manuscript and the history it holds, they uncover a conspiracy that could threaten the existence of all supernatural creatures.

The series is set against a backdrop of political intrigue and danger, as various factions of witches, vampires, and demons fight for control over magic, bloodlines, and power. The couple must navigate complex relationships with their respective communities while grappling with their forbidden love. As Diana’s powers grow stronger and more dangerous, she must come to terms with her legacy and her role in shaping the future of magical beings. Alongside their personal journey, the couple works together to uncover the hidden truths of the manuscript and prevent its dangerous knowledge from falling into the wrong hands.