A manager of a company has made an embezzlement just to make the sweet life possible with his lover. An office manager promises to take the blame if the manager promises to behave better.
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.
