Popular Los Angeles radio singer Gary Mitchell's refusal to sign another contract with Felix Hofer, the sponsor of the "Enchanted Hour," angers Doug Blake, his agent. Gary offers to take Doug with him to his new program as his secretary, but Doug vows to find a new "Gary Mitchell." Doug's boss, Thomas Hutchins, begs Doug to offer Gary anything he wishes in order to convince him to sign with Hofer, but Doug quits rather than comply. In New York, Doug searches everywhere for a replacement act and is about to give up when he hears Martha Gibson, a turntable operator for a jukebox service. For singing to Doug, rather than playing a record, Martha loses her job, and so misses Doug when he hurries to the station to sign her. After a few more misses, the two finally connect and set off for California, and Martha, a war widow, is forced to leave her young son Freddie behind with her uncle Charlie. In Los Angeles, Martha auditions for Hofer, who does not like her upbeat, jazzy singing, but Gary is attracted to her and invites her to lunch. Doug is still determined to make Martha a success. He persuades Vivian Martin, Hutchins' secretary to share her apartment with Martha and then tries unsuccessfully to find her a job. Finally, Martha gets herself a job at a nightclub, but conditions there are so bad that she quits. Later Doug flies Freddie out to California, imposing yet another roommate on the irritated Vi. When Doug hears Martha singing to Freddie, he realizes that her strength is in ballads, not jazz. To get the money to audition her again, Doug sells Vi's car and arranges for Martha to sing on the radio. His efforts are wasted, however, when Hofer fails to listen to the performance. Later, Gary invites Martha to a party which is attended by agents and sponsors. Doug sneaks in and arranges for Martha to sing, but Gary picks a fight with him, and again Martha loses the opportunity to perform. One night, a drunken Gary misses his broadcast, and Martha replaces him. This time Hofer loves her singing and fires Gary. Afterward, Martha tries to find Gary, with whom she is in love, but he has disappeared on a binge. One night, after reading a bedtime story to Freddie, Doug proposes to Martha, who turns him down because she is still in love with Gary. After Gary returns, Doug begs Hutchins to take him back as a client, and when Hutchins refuses, arranges for him to sing at the Cocoanut Grove nightclub. He is so nervous that Martha joins him and helps him successfully complete his performance. At the end, however, Martha realizes that while Gary is selfish and egotistical, Doug is generous and loving, and she reveals that she returns Doug's love.