During the fourth civil service exam, Lee Yeon-woo barely survives the , which turns humans into beasts, and receives a job offer from a suspicious company called the "Human Protection Company."<br><br>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?