Russian Prince Mikail Alexandrovitch Ouratieff (Charles Boyer) and his wife, Grand Duchess Tatiana Petrovna (Claudette Colbert) flee from the Russian Revolution of 1917 to Paris with the Czar's fortune, which he has entrusted to them for safekeeping. They keep the money in a bank, faithfully refusing to spend any of it for themselves. Then, destitute, they are forced to take jobs under false identities as butler and maid in the household of wealthy Charles Dupont (Melville Cooper), his wife Fermonde (Isabel Jeans), and their children, Helene (Anita Louise) and Georges (Maurice Murphy). After a shaky start, the servants gradually endear themselves to their employers. However, their secret is finally exposed when one of the guests at a dinner party, Soviet Commissar Gorotchenko (Basil Rathbone), recognises them.