Napoleon’s tumultuous relations with Russia including his disastrous 1812 invasion serve as the backdrop for the tangled personal lives of two aristocratic families.

Overwhelmed by her suffocating schedule, touring European princess Ann takes off for a night while in Rome. When a sedative she took from her doctor kicks in, however, she falls asleep on a park bench and is found by an American reporter, Joe Bradley, who takes her back to his apartment for safety. At work the next morning, Joe finds out Ann’s regal identity and bets his editor he can get exclusive interview with her, but romance soon gets in the way.

Professor Henri Faust, retiring after 50 years as an alchemist in a circa-1700 university, despairs at still knowing nothing of the true secrets of nature… whereupon his old acquaintance Mephistopheles, servant of Lucifer, appears and grants him youth and a new life. But with youth, Faust’s interest is diverted from science to women. And Mephistopheles, who has taken on the guise of the elderly Faust that was, sets many snares for his young friend’s slippery soul…