When Deputy US Marshal Frank Dalton is killed in the line of duty, his brothers Bob and Grat are appointed to replace him. However, when they discover corruption in the higher echelons of the Marshals Service, they resign in disgust. Grat is cheated by a crooked gambler and takes back his money at gunpoint, but that winds up getting them labeled as robbers. Grat is wrongly accused of train robbery and imprisoned. When he breaks out of prison he and his brother decide to take their revenge by actually robbing the express company that falsely accused him in the first place.

Olive Muir, a haughty society girl, objects when Alice Prentice, a girl of lower station, comes to visit her family. After Alice's drunken father comes to visit the Muir home, Olive learns to her horror that she is adopted and that Prentice is her real father.

Four wealthy young men, Larry Van Cortlandt, Castleton, "Fatty" Harriman and Payne, become intoxicated in a cabaret where munitions maker Stanhope Shelton is giving a party for his daughter Natalie. Larry is attracted to Natalie, but he is ejected with his friends before he can secure an introduction. Plainclothes detective Hogan vows to capture Larry, who seeks asylum on his yacht with his friends. After the crew quits, Larry and his friends handle the boat. The next morning Castleton and Payne place a "for hire" sign on the boat and the Sheltons engage it. Larry teaches Natalie to steer and runs into several boats in the process. Four people in the Shelton party turn out to be burglars and rob the other guests. Meanwhile two other crooks rob the Shelton mansion. Larry manages to capture all the crooks at the Shelton home, and he wins over both Natalie and her father.