Humanity–several millions of them–find themselves in one of two unknown star systems, separated from each other. Both groups are stopped from leaving their system by a strange force barrier. After losing several ships, the people in 'System A' (later called New Sol) abandon attempts to leave and begin to settle on the main life-bearing planet, calling it Prime. Adopting a systematic search, the people in 'System B' start to look for a way back to their old systems. They name the system Future’s Hope.