Gangsters try to steal Uuno Turhapuro's father-in-law's money by infiltrating into the family through Uuno, by pretending he has a long-lost son.
as Uuno Turhapuro
as Urho Turhapuro
as Hugo Tuura
as Mrs. Tuura
as Elisabeth Turhapuro
as Nou
as Sörsselssön
as Unelma Säleikkö
as Viinanen
as Härski Hartikainen (uncredited)
