Ah, a great world this one has become. Least that's what most of it's inhabitants think through propaganda. At some point women having kids without the need for male sperm happened... History gets a little blurry... and then the only humans on the world are female. The world isn't perfect... Still discrimination, hunger, war, but imagine how bad it would be if men were around. I mean there was so much technology around that didn't exist when men were around... After several hundred years without men... Food easily generated with cartridges, lots of relatively clean energy, and modern medicine has allowed women to live for 150 years at this point. Women were able to hit their hundredth birthday looking like they were in their mid twenties.
*beep beep* went satellites of the world governments as they started detecting a bunch of UFOs. With a few wars going on most of the governments weren't taking a few UFOs that seriously. Probably imagined they were some space junk that was floating during the men wars. However the UFOs were real, and they were coming for earth. What purpose did they have? What technology will they bring? How will they modify the lives of the women on this female earth?