An expedition is sent down the seemingly infinite seventh chamber (The "Way", as it is known) where it encounters the descendants of humanity. The high technology of this civilization, known as the "Hexamon", with its control over genetic engineering, human augmentation, and matter itself are some of the main points of interest here. The Hexamon includes several alien species who have come to live with humanity's descendants. The Hexamon itself is at war with an alien race known as the "Jarts" from further down the corridor still.