A documentary or rather a bulletin style movie about Finnish Air Forces in the 1930s.

Adalbert "Mussu" Koikkalainen inherits 9,000 marks from his uncle. To buy a milk shop, Koikkalainen needs another thousand marks and work experience, so he applies for a job at the department store Sampo, where he is hired as a scapegoat to receive customer complaints. The saleswoman Irja Salo, who is under threat of dismissal, falls in love with the general manager Vaara, whom she thinks is a traveling salesman.

The lazy but resourceful farmhand Hemminki and the bookworm Lauri initially struggle to cope in the army, but the company commander's cook Mimmi and the captain's daughter Elli help them adapt to discipline and orders.