The series tells the story of a criminal investigation into the murder of businessman Paulo Gomes de Aguiar at the beginning of August. In the midst of the Vargas government crisis, the murder case is taken by police commissioner Alberto Mattos, an honest and incorruptible man who is not well regarded by his co-workers, as the place is totally turned over to corruption.

José Mayeras Comissário Alberto Mattos
Vera Fischeras Alice Lomagno
Letícia Sabatellaas Salete
Lúcia Veríssimoas Luciana Borges Gomes de Aguiar
Elias Gleizeras Rosalvo
Hugo Carvanaas Luiz Magalhães
Rodolfo Bottinoas Clemente
José Wilkeras Pedro Lomagno
Sérgio Mambertias Senador Victor Freitas
Marcos Winteras Cláudio Aguiar
Giba Assis Brasil
Jorge Furtado