
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?
Genres:

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

Rauha Rentola as Anna

Kullervo Kalske as Ara

Esko Mannermaa as Hakanen

Kirsti Ortola as Janitor's Wife

Oiva Luhtala as Janitor

Esko Salminen as Leppä

Liisa Roine as Vesa

Rose-Marie Precht as Pihlaja

Uti Saurio as Pentti Lanne

Laila Rihte as Cleaner

Jarno Hiilloskorpi as Postman

Tauno Söder as Homicide Detective

Leo Pentti as Homicide Detective

Rauni Miettinen as Waitress

Severi Seppänen as Butler

Oiva Sala as Drunk

Kauko Kokkonen as Police Officer

Yrjö Tähtelä as Young Man in Metropol

Varma Lahtinen as Mrs. Lanne

Enni Rekola as Domestic Worker

Paavo Hukkinen as Homicide Detective (uncredited)

Evita Wager as Young Kirsti Skrof (uncredited)

Seppo Haukijärvi as Postal Worker (uncredited)

Elina Ollikainen as Young Woman in Metropol (uncredited)

Lauri Ahokas as Man Holding Kuurna (uncredited)

Seija Silfverberg as Dancer (uncredited)

Tuukka Soitso as Man in Lineup (uncredited)
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