After the fierce battle ended, the two iron-blooded warriors returned home with the bodies of their dead companions. What they didn't expect was that the bodies of their dead companions actually became the habitat of the baby alien eggs. The mature alien burst out of the chest and had the powerful power of both the alien and the Predator, becoming the ultimate alien that even the Predator could not shake. A brutal killing was carried out on the spacecraft, eventually causing the spacecraft to crash into the mountains of Colorado. The surviving aliens escaped from the spacecraft and began to reproduce horrendous. The residents of the nearby town of Conison inevitably became targets of alien hunting and parasitization. The originally peaceful and peaceful town became a terrifying hell on earth. At the same time, a predator who remained on earth learned the message sent by his companion before his death, and he decided to fight against this group of doomed demon enemies to the end...