Copacabana, Rio de Janeiro. Three policemen have been killed over the course of a few days. Espinosa, chief of the 12th Precinct, doesn't have much to go on. When the body of a woman connected to one of the dead cops is found on the sidewalk below her apartment window, things get even more complicated, as a reputed "witness"—the wife of a high-ranking government official—becomes obsessed with the case, and with Espinosa. Nothing is quite as it first appears as Espinosa finds himself in his old haunts of Leme and Copacabana, and in the all-too-familiar terrain of corruption, greed, and fear.