Second Fiddle displays Sonja [Henie] as Trudi Hovland, a schoolmarm of Bergen, Minn. who is called to Hollywood because her local swain has sent her photograph to Consolidated Pictures Corp., which has been looking high & low for just such a heroine. Jimmy Sutton (Tyrone Power), the press agent sent to Bergen to fetch her, at first treats her merely as Entry No. 436. He agrees that she has no chance for the part but talks her into flying to Hollywood for the trip, with her Aunt Phoebe (Edna May Oliver). After a twirl on the ice with her pupils, Trudi consents. Although Trudi does no skating in her screen test, she makes the grade. Jimmy believes that, as the new star, she can be used to bolster the publicity value of Roger Maxwell (Rudy Vallee), a crooner on the studio pay roll whose self-esteem is more impressive than his newsworthiness. Touched by Roger's mash notes, which are really written by Jimmy, Trudi moons over him all during production of Girl of the North. Only when she learns the real author of the notes does Trudi realize that her heart has been bent, not broken.
Source: Time, 34 (July 17, 1939): 51-54.