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.
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.
Sylvi's child is run over by a bus, prompting her to drink poison. She goes blind in the process, causing her husband to lust after her much younger sister. After undergoing a dangerous operation to regain her sight, she hides her repaired vision behind dark eyeglasses, so she can spy on her sister and husband as they carry on their affair.
