Humanity has been blessed to call the elements at a terrible price. Without a ward rune, they will wild into a monster, infected by the element they control. When Elias is blessed with windcalling, it feels a lot more like a curse, since he has no way to get a rune. His half-brother Marc betrays both his country and his goddess to help his brother. He is cut off from the Holy Grove and forced to become a soldier. As Elias desperately searches for a rune and Marc struggles to survive a brutal war, both brothers will be forced to confront truths about themselves and the world around them.