Tanja Bulkova arrives in Finland under the name Toini Salonen and, with the help of spy chief Rosenberg, becomes the secretary of engineer Rautavuori and discovers the drawings of a secret invention.
as vakoilupäällikkö J. Rosenberg, "Pupsik"
as Toini Pulkkinen alias Tanja Bulkova alias Miss Smith alias Toini Salonen
as Valtiollisen Poliisin toimistopäällikkö Ilmari Pulkkinen
as Erkki Kari, Aamu-Uutisten reportteri
as insinööri Rautavuori
as Laaksonen
as Miška, 1. agentti
as 2. agentti
as Jaakko
as Anjushka
as Sofi
