Väinö Kehkonen, the head of a Helsinki-based construction company, takes his wife and the Ärmälä couple to Dr. Puosu for a rejuvenating hormone injection, which causes them to behave like children. The director, previously known for his lack of drive, gains energy and enthusiasm from the injection, both in his business and personal life.

• Suomi-Filmi
• Joel Rinne
• Hilkka Helinä
• Reino Valkama
• Rauha Rentola
• Arvo Lehesmaa
• Lasse Pöysti
• Paavo Jännes
• William Markus