Cupid's Knockout (1926)

Wealthy town "boss" David Manning has everything he desires except Sally Hibbard, and he plots to "rescue" Sally and her parents from a situation and thus put her under an obligation to him. Sally, however, meets Frank Gibson when they find themselves photographed together by a "picture machine." Later, Manning's henchmen attack Frank and his pal, "Rubber Chin" Smith, but the gang gets the worst of it. While on his milk delivery route, Frank overhears Manning's plotting and by accident finds himself at the Hibbard home, where Sally invites him to join a party. The party is invited to a tavern, where Frank follows and frustrates Manning's scheme to stage a police raid by substituting milk for the liquor on the guests' tables. Frank turns out to be the governor's son and is betrothed to Sally.