Niskavuori's Aarne (Arne från Niskavuori) is a Finnish drama film from 1954. It is based on Hella Wuolijoki's play Niskavuori's Bread. In chronological order of the Niskavuori series, the film is the fourth. Aarne has married Ilona and left the house in Niskavuori, which he hosts, where his former wife Martta still lives, while the old mistress is holding the reins. Aarne and Ilona live in Helsinki, but Aarne has not been able to completely break away from Niskavuori, but keeps secretly in touch with the headmaster and gives instructions on the farm management.

Elmeri Vara from the General Stabilization Party, Selma Vuorinen from the Free Enlightenment Party, and Irja Solanen from the Independent Women's Party are competing for seats in parliament. When young Pertti and his classmates start a campaign with caricatures against Vara and Vuorinen, whom they consider unfit, Principal Reino has to decide whether to support the parliamentary candidates or his students, and how he feels about the candidacy of his beloved Irja.

Timo learns about his grandfather Santeri's background in the workers' sports movement. Inspired by this, he begins to encourage his alcoholic father to practice his own sport, javelin throwing.

A farm boy leaves his sweetheart Eliina and moves to the city for a relationship with Laila, a summer guest at the farm.

Professor Visaoksa's spoiled city kids are sent to the countryside to live with their strict general uncle and learn some manners. The general's buddy, who tells the kids war stories and is nicknamed Sergeant Mynkhausen, finally gets the kids under control.

Heikki Aaltonen enlists in military service, leaving behind his father Hemminki, mother Mimmi, and beloved Helvi on the family farm. At the same time, another Heikki Aaltonen enlists, who is completely different in character from the future small farmer Aaltonen. The constant confusion between the men's names, the overprotective attitude of their parents, and Helvi's admission to a domestic science school near the regiment are all factors that tend to disrupt Heikki's military service.

The engagement announcement of Irmeli, an orphan girl who grew up in the barracks, and Olavi, a musician serving in the military, upsets the girl's guardians and the director of the military home, who begin plotting to prevent what they consider an unsuitable union.

It is the summer of 1941. An eastern-Finnish machine gun company receives an order to turn in their surplus equipment. The company is transferred to the front lines. The next morning the soldiers wake to the sound of guns – the war has begun.