After losing his factory job, virtuoso violinist Tommy Breen is inspired by June Norton, who lives in the same boardinghouse to write his song, "When You Smile with Your Eyes in Mine." Song publisher Simon Berg signs Tommy and the song becomes an enormous success. Success goes to Tommy’s head, he forgets June, surrounds himself with Broadway lowlife, spends extravagantly, and becomes infatuated with Mona Merwin, a musical comedy performer. He hits a rough patch, and June asks Berg to help her save Tommy from himself, so he decreases Tommy's ...