Exiled from Chayd and pursued by Runon, Tatsu's life twists into something unrecognizable when he escapes with Yudai into the mountains. Despite the growing danger trailing them, the biggest threat lies within Yudai and his voracious magic, a force spiraling outside his control. Their only hope is to head into Joesar in search of a way to contain the magic. But Joesar's desert holds perils of its own, and the only answers Tatsu and Yudai find lead them farther into storms. Friend and foe blur until impossible to tell apart, and all the while, the unchecked siphon devours any energy it can find. If Yudai can't fix what the Runonian mages broke, the siphon could swallow the world, and Tatsu will watch the horror unfold. No matter how tightly Tatsu's heart is tied to Yudai's, and after everything they have sacrificed for freedom, the past might catch up with them, murky and muddled, betrayal lying in Tatsu's traitorous bloodline.