From back cover: A Galaxy in Flames... A World Without End... A Power Beyond Measure... ...SEPTIMUS User Summary (Shijuro): Based on D6 System A dying empire discovers an ancient Dyson sphere ("Septimus"), complete with planets orbiting the sun inside. The entire inside surface of the sphere is livable with artificial gravity (a habitable surface area equivalent to many millions of worlds). But other factions have found it also and are trying to recover ancient advanced technology and struggling for control of Septimus. This game has Space Opera elements outside and inside of the sphere. Characters can use cyberpunk technologies, psionics and mysticism.