Young Nina was hired as a teacher at a vocational school. She is full of optimism. Trying to get in touch with her charges, looking into books on psychology and taking timid steps towards rapprochement, she tries to understand their problems and feel the very “material” that she will only have to come to terms with...

The action takes place in the 18th century in Lima. The wandering artists Pericola and Piquillo perform in the town square. They love each other, but cannot get married - the poor artists do not have the means for this. Meanwhile, the Viceroy of Peru, Don Andreas-Ribeira, likening to Harun Al-Rashid, dresses up as a commoner and goes out into the city to find out what his subjects say about him. He falls in love with Pericola at first sight. But the fact that she is not married prevents the Pericole from appearing at the royal court.