The Chop Kingdom had been peaceful until the Iron Mask Republic launched its invasion. The kingdom's engineers respond by commissioning a new generation of warships, each paired with an autonomous support robot called the Ironclad — a machine capable of making tactical decisions on its own during combat. The fleet is designed to give Chop Kingdom's pilots a decisive edge against a technologically superior enemy. It launches to intercept the Iron Mask Republic's forces before the kingdom runs out of anything left to defend.