A seemingly ordinary training exercise led Chen Jian and his squad into a completely different time and space. In the post-apocalyptic world, monsters run rampant, and the surviving humans struggle to live under their terrifying claws. To fight the monsters, the living have abandoned everything. Human nature no longer exists; beastliness is the mainstream. To defeat them, one must first become them. ----------------- Chen Jian was supposed to be like the others here, pursuing the maddening evolution. But, when the tungsten-core armor-piercing round first penetrated the Kui Niu's keratin armor, he suddenly discovered... Perhaps there is another way to stay alive?