Millionaire Jonathan Reynolds, Jr. (Charles Laughton) is dying. He tells his son Johnny (Robert Cummings) that he has just one wish - to meet the woman Johnny will marry. When he can't get hold of his real fiancee, Johnny 'borrows' a pretty young hatcheck girl named Anne Terry (Deanna Durbin) for his father to meet in her place. Now fate takes a hand. Old Mr Reynolds' health starts to improve - and he's really taken a shine to his 'future daughter-in-law' Anne! He even throws a house party just so that Anne can sing for famous conductor Leopold Stokowski. How can Johnny and Anne tell the old man the truth? Will they have to follow through on their fake relationship - or can they stage a convincing break up?