Bálint Zeke, the honest old miller of the village, leaves his water-mill to Anna, his only daughter, while the will also provides for the mill to be managed by Forintos Mátyás, a young miller, whom he has been raising since he was very young and treats as his own son. The two young people seem to "like each other anyway", and their marriage would make the old man happy.
Pál Völcsöky comes home from Sweden to get his uncle's heritage, the castle. The valet, Joachim informs him that all members of the Völcsöky family have a right to spend two weeks of honeymoon here.
The title character in Maria Nover (Sister Maria) is played by Eva Szorenyi. A convent-bred lass on the verge of taking her final vows, Maria falls in love with a handsome artist, portrayed by popular operatic baritone Sandor Sved. Due to a silly misunderstanding, she walks out on Sved and marries his best friend Paul Javor. The frustrated suitor quits the art world to become a world-famous concert singer. Years later, he returns to reclaim Maria, only to find that she's not only still a wife, but also a mother and a dedicated nurse. Gracefully bowing out of her life, the Pagliacci-like Sved continues his singing career to assuage his broken heart.