An easy-going corrupt detective is partnered up with a younger, more idealistic detective. The two try to influence each other to become more like themselves but must cooperate when faced with a strange case.
| Actor | Role |
|---|---|
 Ahn Sung-kiDet. Jo Yoon-soo | Det. Jo Yoon-soo |
 Park Joong-hoonDet. Kang Min-ho | Det. Kang Min-ho |
 Ji Soo-wonSu-won | Su-won |
 Kim Hye-okYoon-soo's wife | Yoon-soo's wife |
 Kim Bo-sungDet. Lee Hyung-koo | Det. Lee Hyung-koo |
 Shim Yang-hongPolice Chief | Police Chief |
 Yang Taek-joDetective Chief | Detective Chief |
 Yun Mun-sikPark | Park |
 Choi Jong-wonTea-seong | Tea-seong |
 Lim Dae-hoHwang-jae | Hwang-jae |
 Kim Il-wooSenior Inspector | Senior Inspector |
 Kang Seong-jinPickpocket | Pickpocket |
 Kim Soo-roGuard | Guard |
| JJoo Ho-sungDetective Kim | Detective Kim |
 Lee Ki-youngPastor | Pastor |
| RRa Kap-sungHead of the Inspection | Head of the Inspection |
 Han Hye-sukFemale police officer | Female police officer |
| SSeo Pyeong-seokStreet vendor | Street vendor |