Ruth Wilkins (Joan Caulfield) is engaged to her uninspiring boss Albert - which makes things a little tricky when a handsome Air Force Lieutenant Bill Seacroft (William Holden) turns up out of the blue claiming to be her pen-pal! It turns out that Ruth's patriotic younger sister Miriam has been writing rather passionately to him in the name of building wartime morale! And not only has she been using Ruth's name - she's sent him her photo, too. It seems only polite that Ruth humours the lonely lieutenant. After all he only has two days' leave - and he's come all the way from the perils of war in the hope of making her his wife!