Two men, one timid and one aggressive, make out as comical criminals.

Two tramps, Slim and Wally, through a misadventure, find themselves embroiled in a bootleggers' war when they are mistaken for the infamous gunmen Shivering Smith and Gunkist Casey, and they are engaged by the Spumoni gang to do away with the McGann faction; McGann, terrified by his opposition, hires them in turn to kill Spumoni. Having accumulated a small fortune, Slim and Wally fall in love with Ellen, a nightclub singer who is actually employed by the district attorney's office, and with her help they plan to double-cross both gangs. They arrange a street battle between the factions, only to be unmasked when the real Shivering Smith shows up, but they finally use tear gas to subdue the gangsters. They are disillusioned to find that Ellen is in love with the district attorney and discover that someone has substituted bombs for their newly acquired wealth.