A drug squad consists of 5 detectives: Detective Squad Chief Go, Detective Jang, Detective Ma, Detective Young Ho, and Detective Jae Hoon. The team attempts to take down a criminal organization and they must go undercover to do so. The detectives begin work as employees at a chicken restaurant, but the chicken restaurant becomes famous for its delicious chicken. Due to the restaurant's unexpected popularity, the detectives find themselves in a situation they never expected.