Traveling to a fantasy world where demons are rampant, Gu Qingfeng became a jailer in the Demon-Suppressing Division of the Great Yan Dynasty. At this point, originally known as hell on earth, the ghastly Demon Suppression Prison has frequent unsolved cases! Why do the demons in the Demon Suppression Prison scream every night? Why can Zixi transform into various beauties and become a pedicure technician? Why can a beholder who is proficient in illusions absorb people's souls and become VR glasses? Is all of this a distortion of demonic nature or a loss of morality?