A
Yautja ship leaves
Earth carrying captured
Xenomorph facehuggers and Scar's body before a chestburster emerges, with characteristic traits of both species. The chestburster quickly matures into an adult
Predalien, and starts slaughtering the Yautja aboard a scout ship. One Yautja unintentionally blows a hole in the ship's hull from its Plasmacaster, causing it to crash in a forest outside of
Gunnison, Colorado. The last surviving Yautja onboard sends a distress signal before being killed by the Predalien. The Predalien and several facehuggers escape, implanting embryos into several humans, such as a hunter and his son named Buddy and Sam, and several vagrants in the sewers. On Yautja Prime, the Yautja home planet, Wolf, a highly skilled veteran Yautja, receives the distress signal and departs for Earth with an array of weapons and equipment, intent on solely exterminating the Predalien and the Xenomorphs. He arrives at the site where the ship crashed, using a Yautja's mask to watch a recording of the ship attack and a syringe to detect traces of the facehuggers. He also triggers a bomb that destroys the entire ship. Later, Wolf encounters the corpses of Buddy and Sam, as well as the facehuggers that killed them, using an acid-like liquid to dispose of their bodies and killing a police officer that spotted him, with the town having launched a manhunt to investigate their disappearances. Meanwhile, ex-convict Dallas Howard returns to Gunnison after serving time in prison. He reunites with his younger brother Ricky, who is in love with his classmate Jesse Salinger but is constantly harassed by her boyfriend Dale Collins and his two friends Nick and Mark. Kelly O'Brien also returns to Gunnison after serving in the army reserves and reunites with her husband, Tim, and daughter, Molly. After disposing of the remains of the homeless people killed by the facehuggers and Predalien , Wolf starts killing Xenomorphs in the sewer, but they manage to escape when the Predalien intervenes. The latter escapes as well and makes it to the diner, implanting Xenomorph embryos into the pregnant waitress there who was the wife of the police officer killed by Wolf. Wolf pursues the Xenomorphs to the power plant, where collateral damage from his Plasmacaster causes a citywide
power outage. Ricky and Jesse meet at the
high school swimming pool but are interrupted by Dale and his friends just as the power goes out. A Xenomorph then appears and kills Dale's friends, but Dale, Jesse, and Ricky escape; Wolf then arrives and kills the Xenomorph, destroying the evidence before escaping. Another Xenomorph invades the O'Briens' home, killing Tim while Kelly escapes with Molly. Ricky, Jesse, Dale, Dallas, and Sheriff Eddie Morales gather at a
sporting goods store to collect weapons, where Kelly and Molly meet them. Reinforcements from the
Colorado Army National Guard arrive but are quickly ambushed and slaughtered by the Xenomorphs. Wolf captures Dallas inside the store to use as bait to lure the Xenomorphs. Several Xenomorphs arrive, with Dale killed during the battle by a Xenomorph's blood, and one of Wolf's Plasmacasters is damaged, but Wolf reconfigures the other into a Plasma Pistol. As the survivors attempt to escape Gunnison, they learn Colonel Stevens is staging an air evacuation at the
town center. Dallas and Kelly, however, are skeptical since going there would cause them to become surrounded by Xenomorphs. All of them head towards the helicopter, at the
hospital to evacuate the town, while Eddie and Darcy (wife of Buddy and mother of Sam) head to the evacuation zone. However, the hospital has been overrun by Xenomorphs and the Predalien, who has been building a new hive by implanting Xenomorph embryos into the pregnant women. Wolf arrives at the hospital and dispatches more Xenomorphs, wounding the Predalien in the process but losing his Plasmacaster. During the battle, he accidentally kills Jesse with a Shuriken when she panics. Distraught, Ricky rushes Wolf with gunfire, only to be injured by the Predalien. A Xenomorph attacks Wolf, and both tumble down an
elevator shaft. Dallas takes possession of Wolf's Plasma Pistol. Dallas, Ricky, Kelly, and Molly reach the roof and fight off several Xenomorphs before escaping in the helicopter. Wolf, having survived the fall, kills the remaining Xenomorphs on the roof before engaging the Predalien in single combat. The two mortally wound each other and engage in a standoff just as an
F-22 Raptor arrives and drops a
tactical nuclear weapon, which annihilates the Predalien, Wolf, the rest of the Xenomorphs, and the remaining townspeople there. The shockwave causes the fleeing helicopter to crash in a forest clearing, where the military rescues the survivors. Wolf's Plasma Pistol is confiscated from Dallas, and his brother is given medical attention. Shortly thereafter, Colonel Stevens presents the plasma pistol to Ms. Yutani, claiming that the world is not yet ready for this kind of technology. ==Cast==