'Barney O'Hara is a performer in a touring carnival. He runs a sideshow act with his daughter, Pat, and ex-Shakespearean actor, Horace Worthington Howard, which is struggling to make money. One of the main attractions is Pat's voice.
One day Pat is invited to sing at a party held by Colonel Cameron and his daughter Eve, but her voice fails her. A specialist tells Barney that Pat requires an expensive operation.
To raise the money, Barney agrees to fight a boxer known as 'The Killer'. He is helped in his training by dancer Kitty Katkin. On the day of the fight, ants are slipped into Barney's shorts, causing him to defeat the Killer. He wins the money to enable Pat to have her operation.'