Suddenly finding yourself in another world is a classic premise of a fantasy story. Only Nata is not a superheroine, but an ordinary museum worker, and the new world is not much different from ours. Or is it different? What connects the museum worker Nata, the serf Masha chained in stocks and the engineer Lucky who does not remember his childhood - is it just that they are all parallels? How can local scientists who have accepted them into their team help the aliens? And how to make the only choice on which the lives of many people depend? This is not a story of adventure, but a story of friendship that unites people from many worlds.