The time traveler Shi Wu accidentally awakened the "Ghost Beast Taming System" and counterattacked from a street vagrant to a top beast tamer. The system releases tasks such as "hatching strange eggs", "taming evil beasts", and "guarding the neighborhood" to help him fight against monsters in the supernatural city. In the process, he tamed mutant cat demons, giant frost wolves and other strange beasts, revealing the secrets of the "cracks in the underworld" underground in the city. At the same time, he formed bonds with three gentle heroines with different personalities (a wealthy daughter, a war reporter, and a housekeeper). He eventually led an alliance of animal trainers to seal the natural disaster-level demon "Nine Infants" and became the "Lord of the Underworld" where humans and strange beasts coexist.
