The Cambridge University witches meet every month on the roof of one of the city’s many colleges to discuss books among other things, but lately the ties that bind them have begun to unravel.

Amandine, professor of art history and empath, has the power to feel the emotions of those around her. Lately though, she might have wished for her student Noa’s ability to hear others’ innermost thoughts and secrets, to understand what is amiss in the group and in her marriage. Mathematics professor and master spellcaster Kat struggles with unrequited love, but refuses to use magic to win anyone’s heart. Her sister, Cosima, is not above using such powers, sprinkling pastries in her bakery with sugar and enchantment. But when Cosima sets her sights on the love of Kat’s life, she sets off a chain of events that turns each of the witches’ worlds upside down . . .