Arrogant womanizer Duke McKay is the manager of Danceland, a dance hall that features the music of talented pianist Joe Brooks. One evening, Duke is protecting Joe from Moon, an oafish bully, when Lily Brown mistakenly thinks that Duke is picking on Moon. Duke explains the situation then tries to smooth-talk Lily, who is too worldly to fall for his lines. Later that night, Lily is kept awake by a crap game Duke is holding in the hotel room opposite hers. She ends the game by winning all the money, then reveals to Duke that she is Venus, the popular singer who is to start working at Danceland the next evening. The next day, Lily rehearses with Joe, who plays a rhapsody he is writing called "The Giant Swing." After Lily's successful show that night, Duke apologizes for his earlier behavior and offers to take her for a drive in the country. His apparent sincerity wins Lily over, but soon she is furious again when she kisses Duke and he smugly observes that women are all alike. She insists on walking home, and an angry Duke drives off. Max Brandon, a genuinely nice guy, gives Lily a ride home, and she begins seeing him. Duke is jealous of Max, who owns a chain of lingerie stores, and one evening, locks Max in a closet and convinces Lily to allow him to drive her home. They wind up in the country again, but this time Lily steals Duke's car and leaves him stranded after he proposes to her. The next day, Ada, a gold-digging waitress, accepts Joe's proposal when he reveals that he has $2,000. Meanwhile, Lily decides that the only way she can get out of her contract with Danceland is if Joe leaves and the hall goes out of business. She persuades Joe to send his rhapsody to her agent, and although all the band leaders like it, they tell Joe that it must be played by a symphony orchestra. Lily convinces Joe to use the money he has saved to hire an orchestra in New York and play his music himself, but before he leaves, Joe lends all of his money to Duke, who is being threatened because of his gambling debts. When Ada finds that Joe is broke, she marries her boss, Frederick Newmeyer, and when Lily learns of the situation, she castigates Duke for robbing Joe of his chance to make it big. Determined to pay Joe back, Duke fixes a raffle that Danceland is holding so that his pal, Charles "Limpy" Larkin, will win the $2,500 prize. Duke gives Limpy ten percent of the winnnings, then puts Joe on a train to New York after giving him the rest. Ada discovers that the raffle is fixed, and the angry patrons soon have Duke arrested. Lily pays back the raffle money with a loan from Max and bails Duke out of jail. The quarrelsome sweethearts then drive home and bicker about which one of them fell in love first.