Set in Feudal Japan, young Katakune must find a way through a land destroyed by unseeable demons until he can find solid ground. His brother left for a mission when he was 9, and hasn’t been back since. He doesn’t know if he’ll see him again, but he endures both as a master of weapons and emotions. Aided by the fugitive princess he frequently crosses paths with, Minoru (The main character to Red Moon’s sister book, Black Sun), Katakune leads a life acutely aware of the coming Eternal Eclipse