The grandfather of Zhang Di, a college student, rebelled in the underworld and repeatedly asked for military pay in his dreams. Emperor Zhang accidentally activated the system while burning paper, met two banshee wives sent by his grandfather, and got involved in a dispute between the human and demon worlds. He progressed in catching monsters on campus and in the city, and got acquainted with the Supernatural Investigation Bureau, but was hunted down by the mastermind behind the scenes. While exploring the mystery of his life experience, Emperor Zhang embarked on a life of catching monsters against the will of heaven.
