A catastrophic war caused immense damage to the planet, rendering most of it uninhabitable. As time passed, humanity gradually recovered and buried records of the weapons used so future generations wouldn't repeat the same mistakes. Even so, no secret stays hidden forever — criminals are now unearthing artifacts from the war for their own malicious purposes. Kouga, a member of the Artifact Management Division, works with his partner Ikusu to stop these criminals. When their latest job doesn't go to plan and Ikusu gets kidnapped, something far more sinister than anything they could have imagined is set in motion.