A drug squad consists of 5 detectives: Detective Squad Chief Go (Ryoo Seung-Ryong), Detective Jang (Lee Ha-Nee), Detective Ma (Jin Seon-Kyu), Detective Young-Ho (Lee Dong-Hwi) and Detective Jae-Hoon (Gong Myung). 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.