A convertible automobile leaves a spaceship, descends to Earth, and the astronaut drives to his remote Victorian-style home. When he shows his daughter a glowing green globe from space, the orb turns him into a skeleton and he crumbles into a pile of ash. The globe claims it is the sum of all evil and shows the girl how it destroys the lives of people in multiple dimensions. In 2031 New York City, Harry Canyon, a taxi driver, complains it is the “scum center” of the world. A passenger tries to rob Harry, but he flips an emergency switch that shoots a yellow beam at the robber, who dies and disappears. Harry reads a newspaper article about the “Loc Nar,” an ancient relic on display at the Metropolitan museum. As Harry drives past the museum, the professor who discovered the Loc Nar races outside after being shot. His daughter follows, but the professor insists she run away from the gunmen chasing them. Harry lets the girl into his cab, although he prefers not to get involved. She tells him the gunmen want the Loc Nar, but her father would not reveal its location. She loses consciousness, and Harry carries her into the police station. The officer wants $1,000 for an investigation, so Harry leaves and takes the girl to his apartment. When she regains consciousness, she reveals the Loc Nar is worth a fortune, especially to the Venutians who believe it has spiritual power. She worries that they will kill her, but Harry insists she is safe with him, and they make love. In the morning, he awakens alone and is questioned by two police officers about the girl, but he has no information to give them. Harry’s first taxi passenger of the day is Rudnick, who wants to purchase the Loc Nar and warns that he is impatient. Harry receives a message to meet the girl at the Statue of Liberty. He is followed by two vehicles. He shoots at the first car and it explodes, and his maneuvers cause the other vehicle to crash. Harry meets the girl and she shows him the Loc Nar, a green globe inside a case. She tells him Rudnick will pay a fortune for it, but she is afraid to meet him alone. Harry agrees to help for fifty percent of the money and they make the exchange with Rudnick. However, when Rudnick picks up the globe, he turns green and melts. In the taxi, Harry is excited about the money, but the girl wants it for herself and plans to shoot him. He ignites the yellow emergency beam, killing her and leaving Harry with all the cash. Back in the dead astronaut’s Victorian home, the orb orders the astronaut’s daughter to look into the globe again and learn of a world where it is worshipped. On Earth, Dan finds the globe and believes it to be a green meteorite. However, Dan’s experiments with lightning ignite the globe’s power, and it sends him flying through space, transforming him into Den, a bald, muscular man. He lands near a temple as the Queen tosses a woman named Katherine into a pool as a sacrifice. Den dives into the water, rescues Katherine and carries her through underwater caves to a shore, marveling at his newfound strength and abilities. Katherine reveals she is also from Earth and offers to make love to Den as a reward, but they are interrupted by soldiers who take them to Ard, the Queen’s rival. Ard desires to be the next ruler of their world and needs the Queen’s glowing spear in order to take over. He places Katherine in an enchanted sleep and will only awaken her when Den returns with the spear. Den travels with several guards to the Queen’s palace, but the guards are killed. When Den meets the Queen, he notes the Loc Nar on her spear looks like his green meteorite. Instead of killing Den, the Queen makes love to him. However, when they are finished, she discovers the sphere is gone and blames Den for allowing Ard to steal it. Den escapes and rushes to the temple where Ard is sacrificing Katherine. As Den saves Katherine, Ard and the Queen fight for the sphere. An electrical storm brews overhead, so Den wraps a chain around the orb, tosses it into the storm, and the resulting green glow kills the two rivals. The orb falls to Den’s feet and Katherine suggests he could rule this world but he does not want the power. But when she suggests they could return to Earth, Den prefers his newfound abilities on this planet. The globe launches itself into space and lands at a space station where it is discovered by Fiste, a low-level employee. The corrupt Captain Sternn is on trial and bribes Fiste to lie on the stand. However, as Fiste testifies, the green orb causes him to tell the truth. Under the sphere’s influence, Fiste’s anger erupts and he bulks up to a giant size. Sternn runs away and Fiste destroys part of the space station as he chases the captain. When Sternn is cornered, he pays Fiste the bribe money and Fiste shrinks to normal size. Sternn pulls a lever, ejecting Fiste into space and killing him. Fiste’s decapitated hand, still clutching the green globe, flies through space and time into the Pacific Pearl, a B-17 airplane in the midst of a World War II battle. Most of the crew was killed when the plane was hit, but the green orb reanimates the dead servicemen. As they head toward the cockpit, the pilot parachutes out of the plane. He lands on a remote island covered with crashed airplanes and inhabited by monsters and reanimated skeletal crewmen. The orb explains that from one war to another, its influence is always present. In another world, Dr. Anrak briefs the President’s team about green radiation from space. During the meeting, a happy face spaceship hovers over the building. Gloria, a secretary, wears a green pin, and when it glows, Anrak dives across the table to accost her. A tube from the spaceship drills into the room, sucking Anrak and Gloria up to the ship. Anrak is broken apart, but Gloria arrives intact. She wants to return to Earth but a robot pretends that molecular instability prohibits it. Gloria and the robot have sex, and the alien pilots, Zeke and Edsel, blast off into space while snorting drugs. Back at the Victorian home, the orb informs the astronaut’s daughter that she could destroy it, but her death will break the chain forever. She is forced to look into the sphere one final time to watch it destroy her race. The orb lands on a mountain and its green glow spreads over barbarians, making them even more vicious. As the barbarian leader slaughters citizens in a nearby town, the council of elders summons the last of the Taarak, a legendary warrior race sworn to defend them. As the elders chant, barbarians kill them and leave. The female Taarak warrior, bearing the sacred sword symbol and silver hair, flies on her bird into the temple and obtains the legendary sword that ignites the ancient pact. She is sworn to defend the villagers, but when innocents are killed, the pact is to avenge. She battles several barbarians to learn the whereabouts of their leader. She finds the barbarian encampment near the glowing mountain, but is captured. The barbarian leader laughs at the ease of her capture and tosses her into a deep pit. He orders her bird killed, but the animal escapes and dives into the pit to rescue her. When they fly out of the pit, barbarians shoot the bird down, and the last Taarak warrior crashes to the ground. She is badly wounded and the barbarian leader prepares to kill her. However, the bird bites his leg, and she kills the barbarian. As smoke spills from the mountain, she crawls onto her wounded bird and flies to the summit. Raising her sword to channel lightning, the warrior flies into the green globe and sacrifices herself to destroy the evil. As the globe cracks, the astronaut’s daughter in the Victorian house runs outside as the house explodes. A flying bird descends to pick the girl up and she transforms into the new female Taarakian warrior destined to protect the next generation from evil.