In a world abandoned by the gods, humanity has been wiped out by Tartarus, the God of Destruction. Zephyr, the last surviving human, manages to wound Tartarus in a final, suicidal stand. Amused by his sheer tenacity and the entertainment he provided, the gods grant Zephyr a second chance. He is sent ten years back into the past—not as the world-class warrior he became, but as a lowly temple slave. Armed only with his memories of future raids, hidden artifacts, and the weaknesses of his enemies, Zephyr must exploit the "System" provided by the gods to build an army and kill the beings he once called masters. He isn't just trying to save the world; he's out for divine revenge.