The story is set in Germany and centers around the outbreak of biomechanical creatures named "Demoniacs", who rise from corpses and attack people mindlessly[2]. The Demoniacs have the ability to merge with most technology including cars and motorcycles. Against them is a group of people known as XAT, who police these Demoniacs in an attempt to keep the peace and discover the reasons for the "Demoniac" change. However, all the while, one will rise above all other Demoniacs to become the "Blassreiter".