In different parts of the world, entire groups of people completely unrelated to each other began to mysteriously die. At the same time, it was clear that they did not resist their executioners and they cut them in cold blood, as if in a slaughterhouse. The examination revealed a strange mixture of chemicals in the blood of the victims. This can only happen in places of volcanic eruptions... The US intelligence services assigned one of their best people, Jason Peters, to deal with this mystery. He found out that in Italy, in Campania, there is a place that since ancient times was considered the entrance to Hades - the underground kingdom of the dead. And that not long ago the Italian government closed access to it, citing its particular danger to humans. Meanwhile, the trail that Jason followed in search of the killers leads exactly there...