Detective Cha (Kang Ji-Hwan) smells bad and is overweight. Nevertheless, he is a devoted cop who always tries his best to catch the bad guys. A new case then arises. Illegal narcotics are infiltrating into the fashion industry and a detective is needed to work undercover as a model. There are only 2 detectives taller than 180 centimeters required to work as a fashion model. One of them is Detective Cha and the other detective walks strangely due to to a hemorrhoidectomy. Detective Cha is selected to go undercover as a male model in designer Ko Young-Jae’s (Sung Yu-Ri) next fashion show. Designer Ko Young-Jae tells Detective Cha that he has to lose 20 kilograms in 2 weeks so that he can work as a model in her upcoming show. Detective Cha then goes on a strenuous regiment to lose the weight.