Good King Pausole selects a wife for every day in the year, but one protests when he spends her day searching for young Princess Aline who has eloped with Giglio, a visiting airman stranded in the kingdom. Giglio comes from a modern and different world and this gives Queen for a Day some ideas about how to make her title a lasting one.
It is one thing to open a beauty salon (which Edwige and her young lover Gaston have just done) but it is another to keep it on its feet.To best promote their speciality, fountain-of-youth treatments, Edwige decides to apply to the letter the old slogan "It pays to advertise" by posing as... Gaston's mother, a sixty-year-old woman, miraculously grown younger.