This musical romantic comedy, Deanna Durbin's feature film debut, was a huge box office hit that made Durbin an international star almost overnight. Durbin plays Penny, one of the three vivacious Craig sisters who live with their divorcée mother (Nella Walker) in Switzerland. Their mother is heartbroken when their father (Charles Winninger) announces his plans marry a second time. The three smart girls set off for New York to see what they can do, where they discover that their father's new fiancée Donna Lyons (Binnie Barnes) is nothing but a cold-hearted, gold-digging socialite. Hoping to scupper the wedding plans and reunite their parents, the girls embark on a complicated and wildly imaginative scheme. Songs include 'My Heart Is Singing', 'Someone To Care For Me' and 'Il Bacio'.