Married to Karl Ammer, the station master of Thaya, a Hungarian quiet village, Anita is a pretty young peasant who feels deeply bored. She dreams of another life while watching the daily express trains to Budapest. An incident will force her to leave her province: she has to go to Budapest to attend the funeral of an aunt and receive a share of the inheritance. After completing the formalities, Anita misses the train to go back home and then she finds herself alone in the capital.

Pursued by the police, Saget usurps the identity of a man who was returning to his town after having made his fortune in the United States. Under this new name, he deceives his compatriots with the exception of a doctor and the savage Isabelle. During an explanation Saget understands that Isabelle secretly admires him. She denounces him and Saget surrenders without a fight. Thus he ruins all his prestige with the young Amazon.

Following a broadcast on the radio, each of the listeners remembers these "little nothings" (the title is borrowed from a play by Mozart), which have often changed their lives. Each of these stories told will prove that a tiny detail in life can change an entire destiny.