It is the year 454AD. The Roman Empire has withdrawn from Britain, throwing it into the chaos of the Dark Ages. Mai has been kept safe by her father and her sister, Haf. But when Saxon warriors arrive at their farm, the family is forced to flee to the hills where British warlords lie in wait. Can Mai survive in a dangerous world where speaking her mother tongue might be deadly, and where even the people she loves the most can't be trusted?