La frontera negra

 A person is buried alive, a young man disappears mysteriously, a fake spiritualist session does not turn out as expected, a remote village in the Amazon is dominated by a diabolical being and attacked by two strange men…The time has come. The dreaded time is approaching and a series of unusual events all over the world are leading up to it. But what is the black frontier? It might be better not to know the spine-tingling answer.