After 12 long years, a white-haired boy by the name of Iori comes back to Mashira village, the place where his childhood trauma began, only to find yet another horror awaiting him.

In 52 B.C., the Chieftain of the Arveni tribe, Vercingetorix, united the Gauls in a major revolt against the power of the Romans. This is his story, beginning with his rise to power. In one of the tribes, he rescues the 11-year-old Taranis, the only son of a Gallic hero who was executed by the Romans. Taranis follows Vercingetorix as he raises his army to fight for the freedom of Gaul.