Emilie des Marais is more at home holding scalpels than embroidery needles and is desperate to escape her noble roots to serve her country as a physician. But society dictates a noble lady cannot perform such gruesome work.

Annette Boucher, overlooked and overworked by her family, wants more from life than her humble beginnings and is desperate to be trained in magic. So when a strange noble girl offers Annette the chance of a lifetime, she accepts.

Emilie and Annette swap lives―Annette attends finishing school as a noble lady to be trained in the ways of divination, while Emilie enrolls to be a physician's assistant, using her natural magical talent to save lives.

But when their nation instigates a terrible war, Emilie and Annette come together to help the rebellion unearth the truth before it's too late.