Peggy (Peggy Ryan)), a messenger, delivers a telegram to The Flamingo Club where the Andrews Sisters (The Andrews Sisters) and Bob Edwards' Orchestra are appearing. Peggy learns that the club's owner, Harrison (William Frawley), intends to enlarge his show and she persuades him to give her and her friends a tryout. If they make good, they can save the dancing school run by Professor Woof ('Charles Butterworth')) and Gribble (Walter Catlett)) . Press agent Kendall (Richard Davies) recognizes the leader of the group as Gracie Waverly ('Grace MacDonald'), the niece of three millionaire aunts. When Gracie's picture appears in the newspaper, Harrison immediately signs the group, the Waverly sisters, order Gracie never to dance again or she will be disinherited. Professor Woof, using the Andrews Sisters to pose as the Wavely sisters, as a ruse to allow Gribble to bring Harrison to get permission to sign Gracie; this works until the real Waverly sisters show up, and with two sets of Waverly's, complications arise.