Stevenson, the famous English criminal expert visits Hungary with his family. While he is chairing a conference on criminology, infamous art treasure robbers steal the golden herm of Saint László. Suspicion is cast on the Stevenson children.

This is a romantic biographical film about Franz Liszt. In a distinguished saloon of Paris, the unknown composer, Liszt, defeats the renown Thalberg at a piano competition. Through his playing, he wins the favours and later the hand of the countess D'Agoult. A daughter is born in their marriage, Cosima. Liszt is better and better known, Marie introduces him to the circle of artists.