Introduction：Parallel universe 1216, 2042. Several years after the invasion of extraterrestrial beings M16 in the constellation of Hercules on Earth, the Earth's Joint Defense Force's fugitive soldier Cheng Ling was attacked by an extraterrestrial Hellhound while collecting waste,And unexpectedly encountered Gao Ren and others from the Zhurong team. Along the way, everyone encountered encirclement from predators, pursuit from Hellhounds, and met Dr. Dorgipam, who mastered the technology to counter extraterrestrial Hellhounds. On the journey,Under the spirit of fearless sacrifice and fighting back from the team members, Cheng Ling gradually transformed into a qualified joint defense force. When everyone arrived at the resistance stronghold, they found that the so-called resistance stronghold was just hellThe trap set by the dog hunter, after everyone's desperate resistance, was successfully sent out by Cheng Ling and Duo Jipam at the sacrifice of Gao Ren and others, disrupting the Helldog hunter's encirclement of the resistance armyThe plan thus triggered the prelude for the Earth Defense Forces to counterattack extraterrestrial invaders.