Pentti Saarikoski

Director Emil Rantamo goes with his family to the country for the summer. The family's son Fritsu gets engaged to Tipuli Niemi. Sausage maker Niemi thinks his daughter is engaged to the manager Rantamo himself.

A French cultural research group arrives in Finland. From Helsinki, the group travels to Saimaa to participate in Midsummer rituals, where the summer night celebrations overwhelm the researchers.