Some 3000 years in the future, a Communist Earth has just developed faster-than-light space travel based on the experiment of Ren Boz (of The Andromeda Nebula).
The plot follows the Communist crew as they establish contact and explore the planet's society, eventually sacrificing some lives including that of the expedition leader, female historian Fay Rodis, for the sake of free future of the planet and its people's children.