is secretly controlled by angels; and Tokyo, a modern-era city enclosed in a rock dome and overrun by demons. Prior to the game's events, when Tokyo became a demon stronghold and was threatened with destruction by angels, a member of Tokyo's Counter-Demon Force tamed the God , fusing with him to create the protective dome over Tokyo. Mikado is built on the dome's surface. After the dome is created, only twenty years pass in Tokyo while over a thousand years pass in the Kingdom of Mikado. Remnants of Tokyo's technology, studied by the Mikado church as "mystic relics", remain scattered throughout the land. Players control a Samurai who is the reincarnation of Tokyo's savior. His default name is : as with previous Megami Tensei player characters, he is a silent protagonist, with his actions and attitudes determined by the player. Three other characters accompany Flynn on his journey, representing the game's three main moral alignments. They are , representing Law; , representing Chaos; and , representing Neutrality. Other important characters include , Flynn's AI assistant; , a powerful demon from Tokyo; and , a former childhood friend of Flynn's. Story Shin Megami Tensei IV begins with Flynn and his friend Issachar traveling to Mikado Castle to undergo a test as to whether they are worthy of becoming Samurai, the guardians of Mikado who both confront and control demons. Issachar fails, yet Flynn succeeds and is promptly initiated along with other candidates, including Walter, Jonathan, and Isabeau. The new Samurai prentices receive electronic gauntlets containing A.I.s: Flynn's A.I., Burroughs, supports him throughout the game with advice. Shortly after their initiation, unrest rises in the countryside as a figure calling herself the "Black Samurai" distributes books written to spread "knowledge and wisdom"; some residents of Mikado, including Issachar, are turned into demons after reading the books at gatherings called "Sabbaths". The Samurai are sent to confront the resulting demons and the Black Samurai. After restoring order to Mikado and killing Issachar, the Samurai are told to pursue her to the legendary land that lies beneath Mikado, Tokyo. The Samurai climb down a tunnel which leads to the top of a skyscraper; they discover Tokyo is a city covered by a rock dome which has enclosed it in eternal night, while Mikado lays upon the surface of the dome. The party explores Tokyo searching for the Black Samurai, confronting a variety of foes: