PLAN 9 FROM OUTER SPACE

Mourners gather around an old man (Lugosi) at his wife's grave site as an airliner overhead flies toward Burbank, California. Pilot Jeff Trent and his co-pilot Danny are startled by a bright light, accompanied by a loud noise. They see a flying saucer land in the cemetery near Jeff's house, where two gravediggers are killed by a ghoul (the reanimated wife of the old man).

Lost in grief, the old man is struck and killed by a car in front of his home. Mourners at his funeral discover the gravediggers' corpses. When Inspector Daniel Clay and his police officers arrive, Clay goes alone into the cemetery to investigate.

Jeff tells his wife, Paula (the old man's granddaughter), about his flying saucer encounter, saying that the Army has sworn him to secrecy. Another saucer lands, and a powerful swooshing noise knocks the Trents, and the police officers in the cemetery, to the ground. Inspector Clay is murdered by the ghoul and her husband's now-reanimated corpse. Lieutenant Harper says: "But one thing's sure. Inspector Clay is dead, murdered, and somebody's responsible!".

Newspaper headlines report flying saucer sightings over Hollywood Boulevard, and three of them fly across Los Angeles. In Washington, D.C., the military fires missiles at several saucers. Chief of saucer operations Thomas Edwards says the government has been covering up saucer attacks.

The aliens return to their Space Station 7, and Commander Eros tells the alien ruler that he has been unsuccessful in contacting Earth's governments. Eros recommends "Plan 9", the resurrection of recently deceased humans. Concerned about Paula's safety, Jeff urges her to stay with her mother while he's at work, but she refuses. That night, the undead old man breaks into their house and chases Paula outside, where the female ghoul and Inspector Clay join him. Paula escapes, collapsing in the woods while the three ghouls return to Eros in the saucer.

At the Pentagon, General Roberts tells Edwards that aliens have been telling the government that they are trying to prevent humanity from destroying the universe. Roberts sends Edwards to San Fernando, where most of the alien activity has occurred.

The zombified Inspector Clay goes berserk and attacks Eros, nearly killing him. The ruler approves Eros's Plan 9 to raise armies of the dead to march on Earth's capitals.

Edwards and the police interview the Trents, unaware that the flying saucer has returned to the cemetery. Officer Kelton encounters the old man, who chases him into the Trents' backyard. Eros's long-distance ray strikes the old man, reducing him to a skeleton. Edwards, the Trents, and the police drive to the cemetery.

Harper insists on leaving Paula in the car; Kelton stays with her. Eros and Tanna (his fellow female alien) send Clay to kidnap Paula and lure the other three humans to the saucer. Seeing its glow, Jeff and the police approach it. Clay knocks Kelton unconscious and carries Paula into the woods.

Eros lets Jeff and the police enter the saucer with pistols drawn. He tells them that human weapons development will lead to the discovery of the "solaronite" bomb, a substance that explodes sunlight particles. Such an explosion would set off an uncontrollable chain reaction, destroying the universe. Eros believes that humans are immature and stupid; he intends to destroy humanity, threatening to kill Paula if Jeff and the police try to stop him. Kelton and Larry arrive and see Clay near the saucer carrying the unconscious Paula. They sneak up behind Clay and knock him out with a club. Eros says that Clay's controlling ray has been shut off, which released Paula. He and Jeff have a fistfight inside the ship, and the saucer's equipment is damaged and catches fire. The humans escape, and Tanna and Eros take off. The fire consumes the saucer, which explodes, and the two remaining zombies decompose into skeletons.

The film concludes with the aliens' plans ultimately being thwarted, and the immediate threat of the undead neutralized, as the humans regain control of their world.

The ending reaffirms humanity's resilience in the face of extraterrestrial manipulation, as the combined efforts of Earth's defenders manage to stop both the aliens and their undead army. While the invaders' motives are revealed to be motivated by a warped sense of cosmic stewardship, the film leaves viewers pondering the unpredictable consequences of meddling with life and death.