In this romance, a lovely young debutante falls in love with a jazz violinist. Her mother wants her to marry a wealthy young man, but the strong-willed girl initially demurs until the night of her debut. Her social adviser fills the debutante’s dance card with partners, which inflames the violinist.
U.S. sailor Jimmy Harrigan, on shore leave in San Pedro, meets and falls for Sally Brent She promises to wait for him when he ships out to San Francisco, but Jimmy becomes jealous and tells her off when he learns Sally has entered a marathon dance contest sponsored by a lecherous snake named Baron Portola. Along with several of his Navy pals, Jimmy goes to the ballroom the night of the dance marathon, to try to change Sally's mind and win her back.