Last Refuge

World view setting -**Time setting**: In the near future world, human civilization collapsed due to nuclear war and biochemical experiments. -**Location setting**: The story takes place in a desolate desert area. This was once a bustling city, but now only ruins and radiation areas remain. -**Basic background**: The world has experienced nuclear war and biological and chemical crises. Most areas have become wastelands. The survivors are struggling to survive in the harsh environment. -**Theme Elements**: -**Radiation Mutation**: Nuclear radiation causes biological mutations, producing dangerous mutant organisms. -**Shelter Civilization**: The underground shelter has become the last refuge of mankind, retaining the technology before the doomsday. -**Survival Test**: With scarce resources and harsh environment, human nature is tested in desperate situations.