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A story about the problems of an aging high school history professor, Barchánek, and his teenage son. Barchánek teaches at a technical school in the same class as his son Honza. However, he is not very impressed by his father's position at the school and his generous and understanding attitude towards the youth. Barchánek is unable to punish with bad grades. Honza is ashamed of his father and defies him. Both are thus put to the test – the son and the father, and his easily vulnerable goodness and belief in the responsibility of the rising generation, which must be understood and trusted...