The earth is about to face an unprecedented disaster. The population carrying capacity is exploding, the environment is rapidly deteriorating, and natural disasters are frequent. Human migration to Mars has become a top priority. However, there are unknown dangers in unknown areas. The weak will eat the strong and the fittest will survive. Governments of various countries will issue instructions to select experimental subjects. In the unknown future, the human network will be cut off and the universe will block everything. At that time, can we still meet each other?