Being sent to a war at the end of the world, Leonardo loses his life. Now he sees himself in a medieval, hostile world, in which humans are treated as slaves. Plunged into this new conflict, he refuses living with a chain around his neck. And so the war veteran becomes entangled in a fractured human rebellion torn between two opposing visions of liberation: genocide or coexistence.

In a world built on oppression, is genocide the only path to freedom, or can justice be achieved without becoming the very evil sworn to eradicate? With his advanced knowledge of warfare as both weapon and burden, Leonardo holds the power to tip the scales of war—but the choice of how to use it may determine not just who wins, but what kind of world will emerge from the ashes of conflict.