Samuel Hyst and the Tango Platoon have gone up against everything from space pirates and hideous mutants to the heavily armed elite troopers of Helion Corporation. However, nothing has prepared them for the horrors that await them in the darkness of the subterranean underworld of Vorhold.

Economic competition between companies has escalated into full scale galactic conflict, and the salvage marines are at the center of the catastrophe. Samuel finds himself capturing hostages that can be ransomed back to rival companies.