The U.S. military extracted alien genes from the fallen flying saucer to conduct biochemical warrior experiments, but the leak of the genetically modified virus plunged the world into a biochemical crisis. Li Zhi was bitten by a zombie, but survived and became a biochemical warrior. In order to end this chaotic apocalypse, Li Zhi led The companion embarked on a long journey. Li Zhi said: All the culprits who caused all these disasters will surely fall into hell forever!