Reporter Jimmy Munroe is writing an article on "the average woman". He meets Sally Whipple in the library and chooses her as a likely subject, following her around to gather material for his article, and eventually falls in love with her. Her father, Judge Whipple, doesn't like it; he has Jimmy arrested and allows him to see Sally only once a week. Meanwhile, disreputable businessman Van Alten is after Sally, and tries to pressure her into marrying him by threatening to release letters he says will embarrass her father.
Tom Fowler watches in horror as his brother Ed is gunned down in cold blood. With his dying breath, Ed asks his brother to bring the killer to justice. Discovering that the hit was ordered by the city's top mobster, Marty Kirkland, Tom takes an undercover job at the racketeer's Broadway nightclub. Avenging his brother is momentarily forgotten when he falls in love with a gorgeous chorus girl, Nan Morgan. But Tom is shocked to learn that Kirkland is the flapper's boyfriend. Now with the life of the woman he loves at stake, Tom vows to take down the mob boss once and for all...even if he has to punch out every crook from Brooklyn to the Bowery.
Fannie joins Johnny to perform a music-hall act which becomes a success, until two Broadway producers catch the act and offer Fannie a job on their latest show; however, they have no place for Johnny, so Fannie turns down the offer. (Film considered lost.)
