The film is essentially a two-part program. The first half consists of a romantic comedy storyline involving an aerialist, played by Gene Kelly, who is drafted into the US Army but really wants to join the air force. During training, he falls in love with Kathryn (played by Kathryn Grayson), the daughter of his commanding officer, who has similarly put her singing career on hold in order to serve by providing entertainment for the troops. Unusually for this type of a film (and for this era of Hollywood), the character Kathryn has only recently met her father for the first time since she was a baby, her parents having divorced. A related subplot has Kathryn conniving to get her parents (played by John Boles (actor) and Mary Astor) to reconcile. During the first part of the film, Grayson sings several numbers and Kelly performs one of his most famous routines, dancing with a mop as a partner.