Every ten years, deadly monster waves decimate humanity, unleashing hordes of demihumans and monsters upon the realm. During a brutal frontline engagement, young soldier Kaiyan encounters a goblin armed with a crude spear—but when the creature injures him, he awakens as a Player with a game system unlike any other. Armed with character levels, skill creation, strategic battle mechanics, and a perk shop, Kaiyan must master his extraordinary abilities while pursuing revenge against the monsters that obliterated his home. Can he grow strong enough to save humanity, or will he succumb to the next catastrophic wave?