The world is being swallowed by darkness, and humans have retreated underground, using technology and defenses to survive. Knox, an engineer who was afraid of death, faced death for the first time on the battlefield. After a mental breakdown, he was rescued by the girl Krystal. Beautiful and cold, she is the only war weapon that can suppress invaders, but it is also a "curse" that makes the controllers around her unable to survive two wars. The first six operators were all killed, and the seventh one was Knox. Before the doomsday destruction, can those who are afraid of death become the exception?
Intention: the end of the world, all living beings, the future, the meaning of life