The Roughnecks return to Hydora to locate two squads that have seemingly vanished into thin air.

The Roughnecks discover the commander of Delta Squad, Lt. Ross, wandering around on Hydora with his long-term memory wiped out and his entire squad missing.

Sent to the planet Tophet to determine if it can be used as a waystation, the Roughnecks encounter an indigenous race of humanoids.