In a world where people empower quartz to move machinery and pilot giant golems, Rygart Arrow is a rare "un-sorcerer" who cannot use quartz at all yet pilots an ancient golem that responds only to him. The fourth installment of the Broken Blade film series follows Krisna's war against the invading nation of Athens, with Rygart caught between the kingdom's defense and ties to friends on the opposing side. It continues directly from the earlier films.