In a post-apocalyptic polluted earth overrun with mutated beasts called Filth Monsters (Contaminoids in Funimation's translation), humanity is forced to live in large mobile cities called Regios and learn to use weapons called DITE and harness the power of K to defend themselves. In the Academy City of Zuellni, Layfon Alseif is hoping to start a new life without Martial/Military arts and forget his past. However, his past has caught the attention of Kalian Loss, the Student Council President and Nina Antalk, a Military Arts student and Captain of the 17th Platoon, who instantly recognizes his abilities and decides he's the perfect candidate to join her group. The series follow Layfon's life in Zuellni and occasionally has flash backs of his life in Glenden.

Note: Sountrack/ Bonus CD is a promotion item and will be removed from the package without notice once sold out. Thank you.