Lieutenant Ville Somero investigates a sabotage at a fortress site on the Karelian Isthmus in the summer of 1939. His suspicions are directed at the guests of a nearby guesthouse. Aarno Teräs an engineer leading the fortification site, and his bride Birgit Lahti get into trouble because of a band of spies and dancer Veronica Sorrento.

A man mixed up in suspicious activity is murdered in the studio of photographer Ilmari Lavio. At the same time a charming woman has entered the studio, but Lavio does not want to report her to the police. The photographer begins to follow the beauty who calls herself Soile Mäntymaa and through her traces a league of spies.

At the eve of Crimean war orphaned Regina lives with her grandmother in a small cabin near a lavish villa. As the summer approaches there is great anticipation of a big ball to be held.

The year is 1895 in a small village in Savo, where new ideas such as women's rights and folk high schools are vehemently opposed by Pastor Jussilainen, both in his home and in the parish. His wife Eveliina, the maids, and the conservative parishioners all experience his vehemence. However, the pastor meets his match when his mother-in-law arrives for a visit.

Katariina, an orphaned girl from the north, travels to Helsinki to live with her distant relative Mauri, who has been appointed her guardian. The unpretentious child of nature irritates, amuses, and charms Mauri, who is accustomed to high society, and his bachelor friends.

The priest's daughter, Vappu Kankare first irritates and then admires the ambitious habitant, Jalmar "Jali" Kinnunen. After the studies, Vappu and Jali get married, but the marriage is disappointing.

Colonel Barring has purchased the Maanala estate, where strange things are happening. She wants to cancel the sale and writes to Major Hector, who is acting as the owner's representative. The major sets off for the estate with the colonel, his wife, his nephew George, and George's fiancée Vappu. The colonel's son Leo also arrives, accompanied by his new love interest, Sirka. The group spends an unforgettable night in the haunted house.

In this comedy set in Helsinki in 1940, laid-off office girls Sirkku, Irkku, and Mirkku forget their everyday worries in the company of cheerful musicians Vallen, Jalle, and Nalle.