In the final months of World War II, 14-year-old Seita and his sister Setsuko are orphaned when their mother is killed during an air raid in Kobe, Japan. After a falling out with their aunt, they move into an abandoned bomb shelter. With no surviving relatives and their emergency rations depleted, Seita and Setsuko struggle to survive.
Young Horus lives in a mythical Scandinavia of the Iron Age. Recovering the stolen Sword of the Sun from a rock giant, he learns he must travel to the lands of his ancestors, encountering the beautiful but enigmatic Hilda as his journey leads to a series of adventures.