In our understanding of time, it is the year 20,000 BC where civilizations are about to discover galactic travel through the latest technology of their time. Earth was different back then. The deserts of south Egypt and Ethiopia are green and full of advanced technology.
Carter is a botanist at the space station Marsi-3 orbiting Jupiter. Along with his girlfriend Alex, and your guidance, they might be able to witness their civilization shifting into a higher type.