Corporate drone Su Jin is fired after angrily confronting a client to protect a female colleague. With nowhere left to turn, he receives a mysterious and eerie employment notice from a secretive company, plunging him headfirst into a doomsday survival game. Facing a dying world overrun by monsters, Su Jin quickly awakens from his despair and fear. Relying on his resilient willpower and wisdom, he unites survivors to build a sanctuary. Through wave after wave of life-and-death tests, he leads his team to forge ahead against all odds, ultimately destroying the monster matrix and winning a glimmer of hope for humanity.