On the continent of Cruzon, quartz is the lifeblood of civilization, powering all machinery and granting everyone the ability to wield magic. However, Rygart Arrow has a rare condition that sets him apart: he is born an "un-sorcerer," unable to interact with quartz. Despite this, he attended military school, where he forged deep friendships with Sigyn Erster, Hodr, and Zess. After graduation, his limitations lead him to withdraw to the outskirts of Krisna and settle into a quiet, unremarkable life as a farmer.

But Rygart's peaceful lifestyle abruptly ends when Sigyn and Hodr—now the queen and king of Krisna—summon him to the capital. The kingdom is teetering on the edge of war with Athens, and the situation escalates when Zess, now a general in Athens' army, leads an attack on Krisna's capital.

Amid the chaos, Rygart discovers an ancient Golem—a mobile suit from a long-lost civilization. Unlike modern machines, this one can only be piloted by an un-sorcerer. Armed with this extraordinary weapon, Rygart is thrust into the heart of war, torn between former friends now divided by ideology and bloodshed.