NO REST FOR THE WICKED! Xylo and his unit of penal heroes may have defeated the immortal 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 who couldn't care less about human life and a mysterious artilleryman, Penal Hero Unit 9004 finds itself sinking ever deeper into a vortex of combat and conspiracy!