Diana Bishop, historian and witch, accesses Ashmole 782 and knows she must solve its mysteries. She is offered help by the enigmatic Matthew Clairmont, but he's a vampire and witches should never trust vampires.

It is a bold and romantic thriller that uncovers a secret underworld of vampires, witches, and daemons hiding in plain sight for fear of persecution by humans. Brilliant historian Diana Bishop is a witch denying her heritage. But when she unexpectedly calls up an ancient, bewitched manuscript from Oxfordʼs Bodleian Library, she finds herself thrown into the heart of a dangerous mystery - and the path of the enigmatic geneticist and vampire Matthew...

The Doctor and Donna travel back to Pompeii in AD 79 on the eve of the infamous eruption, investigate a series of grisly murders with the help of Agatha Christie, journey to the homeworld of the sinister Ood, face an old enemy of the Doctor's, and more.