In the distant future, when borders disappeared and humanity finally became one big family, a daring project was organized - Selene's Ark, a lunar base storing the entire history of mankind, all the accumulated knowledge and the entire gene pool of the blue planet. Who could have known that one day it would be used for its intended purpose. A group of astronauts who took over their shift witnessed the death of earthly civilization; right before their eyes, an asteroid destroyed everything they loved and knew. And now these last 50 people must decide: where is their home, on the Moon or on the dead planet? And what is stronger: fear of the unknown or duty to humanity?