After a sudden natural disaster on the earth - a solar flare and a global plague caused the collapse of civilization, Lin Xiao led a group of survivors on a journey to find the 'last safe zone'. The team members have their own characteristics. In the midst of crises, they use humor and tenacity to resolve difficulties, go through internal differences and external threats, and finally work together to fight against natural disasters and the darkness of human nature. The story covers survival in desperate situations, growth and redemption under disaster, and explores the hope, friendship and light of humanity in the end of the world amidst the ups and downs and tight rhythm. There are four volumes in the book, each volume is independent but interrelated, and finally ends successfully with hope and peace.