Detectives have their informant, a.k.a. ‘straw’, to arrest criminal organizations under investigation practices. Tae-bong is working as a straw in a smuggling office. Incompetent detective Nam-hyuk is using him to replace the sorrow of not having a string to pull. While doing his duty in the smuggling gang, an incident exposed Tae-bong’s identity. Without knowing his situation, Nam-hyuk is trying to steal the smuggled goods to turn his life around. But he is dragged into a mysterious crime as he enters another office by accident. At the brink of death, Tae-bong gets through the crisis by chance but loses all the money he has saved after being involved in the incident with Nam-hyuk… A cooperation begins between a detective and an informant, for Nam-hyuk to break the case and for Tae-bong to get his money back!