After a weekend of dancing and camping on a recreation island near the city, a young factory worker decides to stay and cut work for a day. Walking around the now deserted island, he meets a beautiful woman camping alone and sunbathing in the nude on the beach. A hot romance flares up between the worker and the more upper-class married lady, lasting through the light-filled nights of the whole summer week until the woman's much older husband returns to the island the next weekend.
Gunvor Sandkvist
as Siiri Forss
Matti Oravisto
as Usko Siltanen
Toivo Mäkelä
as Bertel Forss
Paavo Hukkinen
as Usko's 1st Pal
Kauko Laurikainen
as Usko's 2nd Pal
Juhani Kumpulainen
as Agitator
Kaarlo Saarnio
as Usher
Leo Jokela
as Usko's 3rd Pal
Matti Kassila
as Narrator (voice) (uncredited)
Maija Autio
as (uncredited)
Ulla Sandqvist
as (uncredited)
Armas Jokio
as (uncredited)
