When Peggy, a Western Union messenger, learns that the Flamingo nightclub is interested in adding new acts to its show, which currently features the Andrews Sisters and Bob Edwards' orchestra, she convinces club owner Harrison to give her friends an audition, in the hopes that they might be able to save their financially troubled dance school. At the audition, Kendall, Harrison's press agent, recognizes the lead dancer as Grace Waverly, the niece of millionaire sisters Agatha, Blandina and Susan Waverly. He takes the heiress' photograph and rushes it to his newspaper connections. After the picture appears in the papers, Harrison immediately signs the dancing group, and gives Professor Chester Woolf, the owner of the dance school, a $500 advance. The old professor uses the money to pay off his debt to Batterman, his costumer. The spinster Waverly sisters, meanwhile, learn of their niece's actions and order her to quit dancing, while their attorney warns Harrison not to try to enforce Grace's contract. Gribble, Woolf's dishonest partner, then has the Andrews Sisters dress up as the Waverly sisters and sneaks them into the millionaires' home. While Woolf, pretending to be a doctor, administers to the sisters upstairs, the disguised Andrews Sisters meet with Harrison and give their consent to their "niece's" dancing. The Waverly sisters discover the ruse and rush to the Flamingo club to confront the tricksters. They arrive before the Andrews Sisters have a chance to change their clothes, and in the ensuing confusion, both sets of "Waverly" sisters take the stage. When the real Waverly sisters discover that they enjoy dancing, they decide to give their consent to Grace's career. At the same time, the constantly quarreling Bob and Grace finally discover their true affection for each other.