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 royalty checks. Tommy's Broadway friends desert him when the checks stop coming. Now that Tommy has seen the error of his ways Berg sends him to a country cottage he purchased in Flatbush, where Tommy finds June waiting to marry him.