Otavio is an idealistic union leader trying to organize workers at a factory to resist the company's exploitative practices. His son, Tião, one of the employees, is more of a realist and doesn't want to risk losing his job by striking. This clash of perspectives puts the father and son at odds....
The documentary records the celebrations for the celebration of the fourth centenary of the city of São Paulo, in 1954. In charge of the party, Pixinguinha, Donga, João da Baiana and other representatives of the Old Guard.