In the distant future, after our world collapsed, new civilisations have emerged, built along neo-feudal structures. In what used to be France, on the edge of an immense forest, stands Cocto Citadel, a fortress-factory ruled over by a lord made almost immortal by advanced technology. But now his daughter, Blanche, finds herself at the heart of a despicable plot - and that as nature itself is showing signs of rebelling against the humans, who seem ready to make the same mistakes as their ancestors.