Dr. Paul Venner, a headstrong young doctor, is working on the development of a serum to renew destroyed brain cells. He is watched with skepticism by his colleagues, whom he repeatedly snubs with his cynical manner. Physician Françoise Maurer also feels his coldness. But very soon he senses that she gains her great strength from her faith, and a deep affection develops between them.

Ilona, the bored wife of an easily distracted professor, falls in love with his friend Tibor, a world-traveler and ladykiller. Although she pursues him, he declines to take advantage of the situation, because she's married to his best friend. Only after her husband shows an interest in a co-worker is it possible for a happy ending to take place for the two new couples.