On the train to Garm, the ancient capital where Akari is to be sent home, a terrorist attack and a foe conjured via taboo magic block her and Menou’s path. And if that wasn’t bad enough, the train is sent careening out of control, headed for an inevitable collision! The only way to stop the impending disaster is for Menou and Akari— Executioner and her Otherworlder target—to join forces. But as Menou will soon learn, this is only the beginning of a sinister plot centered around them...
Long-buried secrets.Menou and her group venture deep into the City of Ruins to reach the Astrologer, who controls the Starhusk. Instead of finding the ultimate weapon to defeat Hakua, they discover a lost one who should've died a thousand years ago. And she's not the only one hiding below. Genom Cthulha has left the Mechanical Society to set himself up in the ancient city. Does Menou stand a chance against an enemy even Master Flare couldn't beat?