Once hailed as an invincible combat legend who conquered entire battlefields, Ron abandoned his war machine eighteen years ago following his wife's dying plea. Settling in a dusty border outpost as a humble school custodian, he raises his daughter Lily in total obscurity, enduring insults from local officers to keep his vow of peace.
When monstrous invaders breach the perimeter, Ron operates a rusted scrap unit to eliminate the threat, only for an arrogant young prince to claim credit and force the custodian onto his knees. But when the royal guards abduct Lily in a ruthless purge, Ron breaks his sacred oath, reawakening his dormant combat armor to unleash mechanical annihilation upon the kingdom.
