Following humanity's downfall, the world is now contested by two opposing groups: the Cyborgs, champions of technological progress, and the Beast Spirits, who have embraced a lifestyle of peace with nature. Shi Heitong, a Cyborg assassin with a distaste for most things, grudgingly joins forces with an idealistic band of Beast Spirits on a quest to restore the ravaged planet. But old wounds can be hard to heal, and as technology and wilderness clash, the question remains: which side will emerge victorious and claim dominion over the Earth?