In a world where magic draws its power from the hearts of living beings, the elements enjoy a delicate balance. After men abuse this magic to slake their own lust for power, dark forces emerge and threaten to drown the world in chaos. Aïna is a Tracker and Ynaé a Protectress. Their clans have been enemies since the dawn of time. And yet only their union can bring about peace. For only peace among men can soothe the elements' wrath.