The earth has become a scorched earth purgatory, and human civilization has been shattered under the trampling of monsters. A meteor shower pierces the sky, bringing the only variable - an amnesia young man who calls himself "Xin". He holds a combat device to awaken the sleeping monster. In the dark, countless "Leonix" with the same origin as him have long been dormant. A killing game with the earth as the arena is dragging mankind's last hope into a deeper whirlpool of conspiracy.
