Detective Lee Su Cheol is ‘Mr. Kindness’ at the civil petitions office. His reasoning abilities are better than of Sherlock Holmes, but his field abilities are worse than a blind man so he always gets the desk job. But this time, he goes on an undercover mission to Mokpo to prove himself as a homicide detective. Su Cheol passes himself off as a local gangster under the name ‘Nam Ki Nam’ to infiltrate into the Sung Ki Family, a criminal ring connected to a huge drug deal.