Mosaico diabolico

Winona Low, a black prostitute, is barbarically murdered. The macabre objects found in his apartment put Nick and Marvin, flanked by a couple of agents wanted by the deputy prosecutor in search of publicity for his electoral campaign, on the trail of a voodoo sect. New elements also move the investigations into "lesbian" circles, and in particular onto the daughter of a TV magnate, a close friend of the victim, but also onto Leroy Brown, Marvin's brother and the black sheep of the family, who someone wants to frame... Marvin, ousted from the investigation in which his brother is implicated among the suspects, goes to his relatives in New Orleans, where he believes Leroy has taken refuge. Meanwhile, in New York, Nick Raider is also suspended because he is accused of the murder of a voodoo holy man implicated in the affair. The agent doesn't give up and, convinced that the solution to the case is to be found in Louisiana, reaches Marvin...