Shortly before his retirement, Gustav Wanzka wants to return to his beloved profession as a teacher after years of working as a district school inspector. As soon as he arrives at the station, he meets the boy Norbert Kniep, his future pupil, who clearly surprises him with his questions. He wants to encourage the pupil, who is considered uncomfortable to the teachers but is very gifted in mathematics. With his highly personal views on educational goals, Wanzka stands in stark contrast to his teaching staff. Any innovations and even positive conflicts are nipped in the bud, and thus the pupils are ultimately educated to mediocrity.
