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.

In the dark side of Rio de Janeiro, vampires deal vampire powder, which provides its users with a small taste of immortality. They work for Limbo Corporation, a company dedicated to the shady business, whose CEO is Limboman. Vlak and Michele reign supreme in the city. But Vlak has a restless spirit and decides to yank from his gums the fang chip through which he is monitored by Limboman. He has a mental blackout and starts to roam the city streets. Michele, searching for a new partner, meets Draco, a decadent vampire and former nemesis of Vlak. Their meeting encourages Draco to go back to the streets where he meets Daphne, a ripper psychopath who attacks her victims with a chainsaw. Draco joins her to find Vlak and avenge himself. Vlak, however, is abducted by Wang Su, a Chinese woman that is ruling the underworld in Rio. Wang Su wants to use Vlak to defeat Limboman and take over the command of the shady business.