In the continent of Cruzon, quartz is the core of daily life, powering all machines and granting everyone the ability to use magic. But Rygart Arrow has a rare condition that makes him unique: he is born an "un-sorcerer," unable to interact with quartz. Still, he attended a military academy, where he formed strong friendships with Sigyn Erster, Hodr, and Zess. After graduating, his limitations cause him to move to the outskirts of Krisna and settle into a quiet, ordinary life as a farmer.
Rygart's peaceful existence is suddenly interrupted when Sigyn and Hodr—now the queen and king of Krisna—summon him to the capital. The kingdom is on the brink of war with Athens, and the crisis deepens when Zess, now a general in Athens' army, leads an attack on Krisna's capital.
In the chaos, Rygart discovers an ancient Golem—a mobile suit from a lost civilization. Unlike modern machines, this one can only be piloted by an un-sorcerer. Armed with this incredible weapon, Rygart is plunged into the midst of war, torn between former friends now separated by ideology and violence.