Agatha Harkness is a powerful witch stuck living amongst an untalented group of witches in 1690s Salem, Massachussetts. That’s all right—it will be worth it once she finally gets her hands on one of the most magical artefacts in existence: The Darkhold, a book of extraordinary power. But just as it’s within her grasp, disaster strikes the coven! Agatha is about to reluctantly save the day when she is rebuffed by the nosy, stuck-up Martha. Now, thanks to the interference, Martha, Agatha and The Darkhold have been unceremoniously dropped in one of the most terrifying locations a witch has ever encountered—modern-day high school. Agatha embarks on a quest to recover The Darkhold and an incognito Martha. She almost starts to feel like she’s found her home, until Martha returns from the shadows—this time with dire consequences.