Goed gedrag

During a drive, son Kees falls out of the car and hits his head on the pavement, causing him amnesia. He turns into a well-mannered young man who does chores for the neighborhood. This to the frustration of Johnny and the rest of the family. They will try everything to get the old Kees back. Meanwhile, Sjakie is really fond of the well-mannered Kees and decides to introduce two important government people to him.