In medieval England, village healer Rosemary walks a dangerous line between serving her community and hiding her magical gifts. But when she encounters a faerie in the autumn mist, her carefully guarded world unravels. Vivienne, beautiful and deadly as summer lightning, offers her ancient magical knowledge in exchange for a single kiss—a bargain no wise woman would accept.
Yet Rosemary can't resist the pull of wild magic, or the way Vivienne looks at her with storm-green eyes that promise both danger and desire. As their lessons in herb-lore become lessons in love, Rosemary discovers that some hungers are worth the risk. But loving a faerie comes with an impossible remain in the mortal world that needs her, or follow her heart into the wild places where mortals dare not tread.