One of their number ventured underground. One of their number promised never to tell. One of their number broke that promise. For years, the chipmunk Rin has heard hideous stories of the dangerous Overworld above. Now, a flame has been struck and the chipmunks of the Underworld are preparing for a tentative war—if their undying queen will grant it. What none of them know is that Rin has plans of her own, regardless of what any ruler might decree. As the underground forces deliberate, aboveground a small war has ended and a larger one is about to begin. The flying squirrel Mariyen and the fox squirrel Kinder start a journey of their own—a journey after the last living white squirrel, Zirreo, a journey that will hopefully give them all the answers they seek about the chaos around them—and save Mariyen’s mother’s soul from the claws of a new evil... if she can be saved at all.