Independent milkman Jimmy Burke (Johnny Hines) exchanges clothes with a wealthy young man for a costume party. While he's there he befriends a pretty girl who he thinks is a maid, but is actually Jean Blair, president of the Milk Trust (Sigrid Holmquist). Burke takes her for a ride on his milk wagon and a romance blossoms. Meanwhile, George Fairchild, who manages the Trust (Wyndham Standing), is involved in crooked business deals. Burke catches wind of the schemes and he organizes the independent milkmen, who appoint him president. Fairchild tries to buy him out and Burke discovers that Jean is the Trust's president. He believes the girl was deceiving him, but she is completely naïve of Fairchild's machinations. She fires Fairchild, and in retaliation, he poisons the milk being delivered by the independents. Burke destroys the early deliveries and rushes to save Jean, who has been tied to a conveyor belt that is headed for an ice chopper. Fairchild is given his just desserts, and Burke wins Jean. This comedy-melodrama was one of Sigrid Holmquist's last films (she was forced into retirement because of a case of Klieg-eyes).