Kouga Saezima travels to a city from his childhood after receiving orders to hunt down the Horror Karma, an ancient female Horror who is one of the infamous Apostle Horrors. By that time, Karma's followers, Kurusu and Shion set up base in a gothic club called Crime to satisfy their mistress's appetite by bringing her various girls and lure them into her realm with false promises of making their dreams a reality. As Kouga arrives, ignoring the memories he has of it, a Makai Priestess named Rekka also arrives in the city and aids a pair of Makai Priests named Akaza and Shiguto in saving a baby from a Horror posing as a mother. However, Kouga arrives and reveals the "baby" to be a Horror that Zaruba identifies as the cannibalistic Apostle Horror Babel. Though Rekka meddles in the fight, Kouga managed to kept her aside before donning his armor and slaying Babel. As he leaves, Kouga is approached by Akaza as he introduces him and his associates to him and Zaruba. When Kouga reveals his mission to find and destroy Karma, Rekka reveals having a personal vendetta against Horror and refuses to allow anyone to rob her of her chance to kill the fiend. However, Kouga and Zaruba are unable to find Karma despite the evil presence they are feeling around the city.