Songwriter Tyler Brice makes a handsome living composing jingles for radio commercials, much to the dismay of his loyal secretary, Pamela Thayer, who thinks that Ty is wasting his talent. Ty reminds Pam, who once aspired to a career as a professional singer, that she, too, is caught in the "jingle jungle," which keeps her employed. Ty also tries to stem Pam's jealousy as he pays an increasing amount of attention to Lynn Stafford, an attractive advertising executive who is interested in more than Ty's songs. Pam and Ty's flirtatious, sparring relationship has never blossomed into a full-blown romance, but Pam keeps hoping that someday Ty will stop taking her for granted. Pam's roommate, Sherry Lane, pays little attention to Pam's complaints, as she feels that Ty is not good enough for Pam. Sherry, who is a costume designer for the prestigious Earl Carroll's Sketchbook musical revue on Broadway, also refuses to help when Pam asks her to give Carroll some of Ty's songs. Sherry explains that Carroll is on a South American tour and suggests that Pam try for herself. Pam then goes to the theater, where harried stage manager Rick Castle misunderstands her intentions when she sings one of Ty's songs, and instead of buying the song, offers Pam a job as a featured singer. Sherry quickly accepts the offer for Pam, but before Pam can tell Ty the good news, she is angered when she sees him kissing Lynn. As Pam is leaving Ty's apartment, she is hit by a car, and although she is not seriously hurt, the doctor's warning about potential amnesia gives her an idea. Telling Sherry that she wants to teach Ty a lesson, Pam pretends to have amnesia and tells the worried Ty that she does not know who he is. Castle, who is developing feelings for Pam himself, overhears the two women discussing their scheme but plays along by sending Pam to mind-reader Milo Edwards, who pretends to be a psychiatrist. Time passes as Pam devotes herself to rehearsals, and Ty, who now realizes how much Pam means to him, tries to help her regain her memory. Pam finally succumbs to Ty's romantic attentions, but more complications ensue when one of his songs, pushed by Pam, is incorporated in the "Vanities" by Castle, even though Ty has used the melody for a jingle for radio sponsor John Clark. Castle, who believes that Pam wrote the tune, tells Ty about the amnesia ruse and makes him think that Pam did it to escape from him. Disillusioned, Ty breaks with Pam, and on opening night, the heartbroken Pam confesses to Castle that Ty is the real author of the song. Realizing that Pam is still in love with Ty, Castle assures her that all will be well, then hides from Clark's lawyer, John Hawks, who attempts to serve him with a summons to prevent the revue from using Ty's song in the finale. The show starts as planned and is a huge success, and as the finale begins, Sherry brings Ty backstage. Moved by Pam's performance of his song, Ty tears up the legal documents and kisses Pam when she finishes singing.
