Broadway stars Gwen Marlowe (Jeanette MacDonald) and Ernest Lane (Nelson Eddy) are appearing in a 6-year run of  Victor Herbert's operetta Sweethearts (Ray Bolger dances the role of  Hans).
Norman Trumpett (Reginald Gardiner) is a successful Hollywood talent scout under pressure to recruit Marlowe and Lane for his studio, which their Broadway producer Felix Lehman (Frank Morgan) is equally determined to prevent.