18 years ago, evil forces Black Feathers fled into the territory of Xi Chengyong the old Ahriman, and stole The Shura Mask, releasing a fiend by it. The old Ahriman decided to destroy the mask and the fiend to protect the city but found that the fiend was just a baby. He adopted the baby who had absorbed the divine power of the mask. The baby grows up, takes control of the mask, and becomes the old Ahriman's successor, continuing to guard the city.