In wartime 1944 in California, defense plant workers Rosalind "Rosie" Warren and her friend Vera Watson must share, on a rotating schedule, the town's last available rental room with Charlie Doran and Kelly Kennedy, who work the other shift at the plant. The landlady, Grandma Quill, also has her grandchildren, Buzz Prouty and Mabel Prouty, and her daughter Stella Prouty --- who is on the outs with her husband Clem --- living with her. Rosie doesn't tell her fiancé, Wayne Calhoun, about the living arrangements and is also plotting with Vera to re-unite the Proutys. Rosie pawns the engagement ring Wayne gave her for money for Clem and Stella. Rosie and Charlie fall in love and get their picture in the paper. Wayne huffily breaks the engagement and wants his ring returned.