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.

Gitta, a young woman who used to be a famous primadonna before her marriage, abandons her husband and her son for the sake of the theatre and goes to Russia with an actor, Vándori. She performs in cabaret as a dancer and is very popular with Russian officers. A Russian colonel falls in love with her, and the debauched Vándori organizes a secret date for the colonel with Gitta. The colonel wants the woman to become his mistress, but she rejects him. Vándori is a gambler, first he gambles away Gitta’s jewellery, then Gitta as well. Years later, at the outbreak of WWI, Gitta leaves Russia with the help of the colonel. She returns home to find her family. She learns about her husband’s death and her son’s disappearance. She becomes a successful actress. A young man falls in love with her, but she recognizes him as her son.

Pista Dankó falls in love with Ilonka Jáky, the beautiful blonde lady, so his old love, Rózsi, the wild gypsy girl, puts a curse on him. Ilonka elopes with Pista and they marry. They live in difficult circumstances, but Lajos Pósa takes up the talented young man. Pista wants to recover his legendary violin, which has fallen into the possession of a Russian prince, so he goes on a tour of Russia. Here he meets Rózsi, who has become a famous dancer and now has a hold on him too. Meanwhile, Pista falls ill and returns home to die. In his last hours, a package arrives from Rosie. He plays his last song with the returned violin.

You can get anywhere in a tailcoat. Viktor Norton, a young man imprisoned by mistake, also knows this. In Viktor’s tailcoat, he can easily get to the Excelsior Hotel, where he will meet the newly wealthy Dupont couple and their daughter Marie.

Prof. Laurent Akush from the Institute of Geophysics is working on a device that can be used to locate coal underground. For successful work he needs a tube XCX13, it is available in the West, but foreign firms sabotage the supply of the device. In his institute there is an enemy engaged in sabotage, but the professor does not believe in enemies. He believes that this is propaganda, science is above ideology, and that "scientists are made of a different dough." Laurent Akush receives an invitation to the international geological congress in Berlin, there he hopes to meet an old American friend, the scientist McLane. He takes with him his assistant Ferenc Ervish and a young Stakhanovite worker, Ishvan Kadosh. The professor does not yet know that in Berlin, Colonel Thompson of American intelligence is preparing a trap for him.

A young peasant boy stands up to tyranny, aided by his trusting friend- a goose.

A celebrated actress's life begins to unravel when her husband begins an affair with a movie extra.