Atys, year 2525. The plant-life of the planet is being ravaged by the Goo, a destructive, recycling agent which spreads unchecked. The four Homin races, massacred three generations earlier by armies of giant insects, are attempting to reconstruct their civilizations. Two rival factions who claim to watch over Atys, the Kami and the Karavan, offer their assistance to the four homin races.

Members of the Karavan claim to be the messengers of the goddess Jena and use technology that is as yet unknown on Atys. The Kamis are mysterious creatures who possess great magical powers. The Fyros, Matis, Trykers and Zoraïs must choose their side. Will they be able to find the right path to lead them to the lost secrets of their ancestors? Will they manage to save Atys from the scourge that blights the land? And who will decide the destiny of the planet?