A rich widow is found dead in her apartment in Helsinki due to gas poisoning. The incident is initially thought to be an accident, but inspector Palmu notices that the murderer made a mistake, and so Palmu, Kokki and Virta begin the investigation: who had come to the apartment through the balcony door and opened the gas tap while Mrs. Skrof was asleep?
Joel Rinne
as Palmu
Matti Ranin
as Toivo Virta
Leo Jokela
as Väinö Kokki
Elina Salo
as Kirsti Skrof
Pentti Siimes
as Kurt Kuurna
Saulo Haarla
as Kaarlo Lankela
Risto Mäkelä
as Mustapää
Henny Valjus
as Alma Skrof
Aino Mantsas
as Iiri Salmia
Toivo Mäkelä
as Lanne
Pehr-Olof Sirén
as Doctor
Pia Hattara
as Hallamaa
