Engineer Kallio, who is searching for uranium, arrives at the summer hotel owned by Director Lehtelä, accompanied by his assistants Joltinen and Pummi and painter Väinö. The manager's daughter Anni, his wife Mammi, and hotel employee Sirkka try to figure out the guests' secret identities.
Leni Katajakoski
Martti Katajisto
Pirkko Mannola
Göran Cederberg
Toivo Lahti
Siiri Angerkoski
Hannes Häyrinen
Eemeli