Xylo and company may have defeated Demon Lord Iblis and saved Mureed Fortress, but their punishment goes on. New enemies emerge-a demon lord with the ability to don a human disguise, and a band of assassins bent on killing Teoritta-plunging the city of Ioff into chaos and destruction. With the addition of a dragon knight and a mysterious artilleryman, penal hero unit 9004 finds itself sinking ever deeper into a vortex of combat and conspiracy!