Han Donggyu (Lee Chunhee) is a lawyer who's lost all of his cases, and for most of his life had the nickname "loser." One day he's given a case to prosecute a bank robber, Lee Changho (Park Sangwook), who happens to be an old high school classmate. Unable to believe that Changho would commit a crime, Donggyu sets out to find out what really happened, and changes himself with the process.