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.
as Anni Lehtelä
as Väinö Virtanen
as Sirkka Mäkelä
as Kalle Kallio
as Edward 'Eetu' Lehtelä
as Mammi Lehtelä
as Joltinen
as Pummi
as Kumpulainen
as Pitkänen
as Lihavainen
as Pätkänen
