After Tsukasa and the others narrowly defeat Gustave's Heavens Flames, he deems the Seven Light Faith a dangerous threat and orders his armies to march at once. Count Arclide follows his orders and marches to subjugate them, but his army is forced to clash with the Seven Light Faith's Knights on a freezing, snowy mountain. Meanwhile, Shinobu joins up with the anti-imperial organization that Jeanne belongs to, the Azure Brigade. After receiving Gustave's order for all of his soldiers to assemble, they seize their chance to revolt and lay siege to Gustave's lands. Though Jeanne demands his surrender, Gustave chooses to fight an intense battle against Shinobu and Jeanne with obsessive loyalty towards his emperor burning within his heart.

Conrad has plans for the Azure Brigade to rejoin the Rreyjagard Empire. However, Tsukasa predicted their betrayal and is now concocting a plan to counteract this.

Meanwhile, an infectious new disease called Septicaemia has spread amongst the commoner. Keine is doing all she can to find a cure; however, there's a Penicillin shortage. To make matters worse, Count Serentius of the Medical Guild demands that Keine allow his Guild to sell opium to the sick. However, Keine refuses this. She instead makes a deal with Serentius that she'll cure the villages with coal. But if she fails, she will allow him to sell the addictive drug.