Space Pioneer 5 - Nephthys - Story Statistics

Jeff and Lest visit Earth. Jeff’s father tells them of a secret space project he was involved in. The Horus travels to Nephthys, the recently discovered outmost planet of the solar system , to investigate. Did an alien species establish an operation base on the planet in the far past? Are they long gone or still around? Jeff, Lest, and Doctor Midad land on the planet.