Ina Massine (Kathryn Grayson) is an opera diva who divorced throat specialist Dr. Lincoln "Linc" I. Bartlett (Van Johnson) three years ago. Nowadays, she regrets this decision and attempts to win back his affection. Linc, however, is engaged to Agnes Oglethorpe Young (Paula Raymond), the beautiful young daughter of his mentor, Dr. Carleton Radwin Young (Lewis Stone). Nevertheless, Ina is determined to reconcile with Linc and grabs every chance to try to seduce him. Linc remains loyal to his fiancée, though, and soon grows irritated by Ina's attempts to impress him. On the night of the premiere of her latest opera ''La Bohème'', Ina is bothered with a sore throat and calls Dr. Young. Linc, who is replacing Dr. Young that night, suspects that Ina is faking. However, when he examines her, he diagnoses a tropical disease she had possibly gotten in South America.