The arrival of a global disaster caught people off guard. Governments around the world worked together to build three arks to lead a small part of humanity through the danger of being submerged by a huge flood. However, the sea level has not dropped, and people are forced to continue to live in the ark. Each ark is a world, and hundreds of thousands of people struggle to survive on the ark. Where should mankind go from here? This article mainly tells the story of the survival of a little person (woman) and her younger brother from the perspective of the heroine. I write this article very seriously. Please give me your support and valuable opinions!