In the future world, the earth is riddled with holes due to environmental pollution, and the human home is dilapidated and depressed. A meteorite suddenly hits the earth, bringing with it extremely lethal alien creatures, and 5.6 million people will lose their lives. The fate of mankind is at stake. Commander-in-chief Li Sheng (played by Nick Cheung) sends an elite force headed by soldier Tai Lai (played by Louis Koo) to implement the transformation plan, but the troops are suddenly attacked violently. Only Tai Lai and communications soldier Guang Zai (played by Wan Guopeng) survived. Officer Tan Bing (played by Carina Lau) insists on implementing Plan B. Commander Zheng Zhongsheng (played by Andy Lau) opposes and asks his old friend Skunk (played by Philip Keung) to support him. Saving the homeland is urgent, but with the quiet reminder of the communicator Xiaolu (played by Wu Qian), Tai Lai discovers an evil conspiracy that is enough to destroy the world...