
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?

as Palmu

as Toivo Virta

as Väinö Kokki

as Kirsti Skrof

as Kurt Kuurna

as Kaarlo Lankela

as Mustapää

as Alma Skrof

as Iiri Salmia

as Lanne

as Doctor

as Hallamaa

as Anna

as Ara

as Hakanen

as Janitor's Wife

as Janitor

as Leppä

as Vesa

as Pihlaja

as Pentti Lanne

as Cleaner

as Postman

as Homicide Detective

as Homicide Detective

as Waitress

as Butler

as Drunk

as Police Officer

as Young Man in Metropol

as Mrs. Lanne

as Domestic Worker

as Homicide Detective (uncredited)

as Young Kirsti Skrof (uncredited)

as Postal Worker (uncredited)

as Young Woman in Metropol (uncredited)

as Man Holding Kuurna (uncredited)

as Dancer (uncredited)

as Man in Lineup (uncredited)