Gus Kahn (Danny Thomas), an aspiring lyricist, takes the advice of co-worker Grace LeBoy (Doris Day) in developing a new song. Impressed, Grace puts his words to music and, with the song's success, the two become songwriting partners. Later, Grace pushes Gus to team up with a popular composer, and his career blossoms as the new team writes several popular hits. Gus and Grace marry and have children while Gus writes for Florenz Ziegfeld's show, then for the movies in Hollywood.