On the way to the holiday camp, 16-year-old Steffi falls in love with Norbert, whom she has known for a long time from visiting grandfather in Pinnow. She made a quick decision to change her future plans and decided to become a milker, because Norbert is the newly appointed apprentice trainer for livestock farming in Pinnow. The grandfather, who is very happy about Steffi's visit, cannot prevent his granddaughter from making up her mind.

Norbert himself was an apprentice in Pinnow and often suffered from the teaching methods of his predecessor. That's why he wants to do it differently.