In the early decades of the tin epidemic, the "national" order system collapsed. As the population plummeted and uncontrollable refugees dispersed, bases with clear divisions of labor were replaced. Later, the surviving bases established a federation. The gaps between skin color, class, and wealth that had spanned thousands of years and could not be destroyed by revolution, reform, or war were filled with the scorched earth of disaster. With mixed blood and mixed blood, people can no longer find or care about anything other than life. "All people are created equal" has been realized in an absurd and cruel way.
One day more than a hundred years after the tin epidemic broke out, Tang Chen, a researcher at the Southwest Base, discovered that another group of people seemed to be guiding the mutation of the tin epidemic. However, before he could find out, the base fell into an unprecedented crisis. In the end, Tang Chen had to leave the base with the only immune sample. On the way to escape, they encountered all kinds of people and bizarre things, and searched for the salvation of themselves and mankind between life and death.
Intention: There are no absolute good guys and bad guys, only interest defenders with different positions.