In London in 1944, performers Kitty McNeil and Donald Elwood entertain British and American troops. Kitty becomes infuriated when Donald, after years of being non-commital, unexpectedly announces onstage that they are to be married. Because Kitty has already married Richard Everett, an American flyer whom she met in a hospital outside London, the performing act splits up. Kitty soon becomes a widow, however, and five years later, she and her son Richie are living with the wealthy Everett family in Boston. Although Dick's sister Carola is sympathetic, Kitty feels stifled by her grandmother-in-law Serena's disapproval of her former profession, and her strict discipline of Richie, and secretly moves to New York with him. Donald is an unsuccessful New York investment broker, and continues to perform for a meager salary at Larry Channock's nightclub. Although Donald first sees Kitty again in the Chili Cabana café, he pretends to run into her on the sidewalk. The former partners try to impress each other with exaggerated success stories, but Donald soon learns the truth, and promises to get Kitty work at the nightclub. That night, Donald falls asleep in Kitty's apartment after telling Richie a story. Unknown to Kitty, a private detective is following her and takes note of her nighttime visitor. Kitty is soon working as a cigarette girl at Larry's nightclub, and the staff looks after Richie, providing him with an education as well as regular meals and naps. Serena's lawyers, Edmund Pohlwhistle and Charles Wagstaffe, show up at the nightclub and threaten Kitty with a subpoena unless she gives Serena custody of Richie. Even Elsie and Bubbles Malone, two beautiful showgirls, fail to dissuade the lawyers from their mission, and the next day, Donald helps defend Kitty when she appears before a judge, who grants her sixty days to find more lucrative employment or a husband. Donald proposes to Kitty, but while they are in line at the marriage license bureau, she learns that he still intends to give up entertaining and pursue investment brokering, at which he is a dismal failure. Kitty rejects Donald, and also refuses to accept $20,000 from Carola, who earnestly wants to help her. Kitty starts dating Donald's friend, wealthy playboy Timothy Bryant, but when they announce their engagement, Donald determines that they are mismatched, and insinuates to Timothy that Kitty is a gold digger. When Kitty then appears wearing his mother's heirloom necklace, Timothy breaks off the engagement. As sixty days have passed, Serena takes custody of Richie. Donald, meanwhile, has invested Carola's $20,000, which she turned over to him, in a racehorse, and impresses Serena when he gets an exorbitant offer to purchase the horse, after it wins a $50,000 sweepstakes. Having charmed Serena, Donald, who plans to give the winnings to Kitty, then declines Serena's offer to become her business manager because of her selfish treatment of Richie. At the same time, Kitty sneaks Richie out of the house. Serena, Pohlwhistle, and Wagstaffe report Richie's kidnapping to the police and then go to the nightclub to find him. Donald and the restaurant staff help hide Richie, and Kitty pretends to be distraught over news of her son's "kidnapping." However, when she learns that Donald has finally accepted his destiny as a dancer, Kitty goes on with the show, and announces their impending marriage onstage. After the show, Serena offers them her country home.