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
Palmu
Matti Ranin
Toivo Virta
Leo Jokela
Väinö Kokki
Elina Salo
Kirsti Skrof
Pentti Siimes
Kurt Kuurna
Saulo Haarla
Kaarlo Lankela
Risto Mäkelä
Mustapää
Henny Valjus
Alma Skrof
