During the fourth civil service exam, Lee Yeon-woo barely survives the "Human Qualification Exam," which turns humans into beasts, and receives a job offer from a suspicious company called the "Human Protection Company." Can Yeon-woo, investigator in the anomaly research team of the Humanity Protection Company, which isolates, secures, and studies abnormalities to protect humanity, safeguard the human world and survive until the end? (Source: Kakao Entertainment, translated)