After Grandmére Ursule gives her life to save her tribe, her scrying stone falls silent. Even with Ursule's magic lost, her family keeps the Old Faith, practicing the spells and rites that have been handed from mother to daughter for generations. Until one day, Ursule's young granddaughter steps into the circle, and magic flows anew. From early 19th century Brittany to London during the Second World War, four generations of women fight the battles of their time, deciding how far they are willing to go to protect their family, their heritage and ultimately, all of our futures.