The System has come online, and, with it, the world has been changed forever. Zayn Greene, using the knowledge he gained from his former life as the Black Knight, a hero who slayed the Demon Lord, has become a demon himself in this new world, hoping to break the chains of fate that bound him in his last life. Now, as the first night falls upon the new world, what will happen to him, and those he chooses to take under his wing?