Story Structure — 5 Plot Phases
Signals Beyond Earth
UFO sightings and Terra's disappearance reveal an extraterrestrial threat. The UN tries to reactivate Takigawa's abandoned Gohten project after an alien impersonation is exposed.
Key Events
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Worldwide UFO Sightings — UFO sightings are reported across America in 1988.
Location: America
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Terra Loses Contact — Terra reports a huge Roman-galleon-shaped object before all communication is lost.
Location: Space Station Terra
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Gohten Request — The UN orders construction of the abandoned Gohten space-defense unit.
Location: Professor Takigawa's residence
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Schmidt Death Report — Takigawa receives news that Schmidt was killed during a mountain investigation.
Location: Japanese branch of the UN Space Federation
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Alien Schmidt Revealed — The returning Schmidt is exposed as an alien impostor wearing a latex mask.
Location: Professor Takigawa's residence
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Impostor Self-Destructs — The pursued alien impostor blows itself up before capture.
Location: Outside Takigawa's residence
Earth Under Assault
The alien attacks spread across major Earth cities while the defense organization mobilizes. The Gohten is completed despite an assault on its island base and launches into battle.
Key Events
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Oshi Takes Command — The UN places Commander Oshi in charge of the defense forces.
Location: UN defense command
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Venusian Invasion Begins — Aliens based on Venus attack New York, London, Paris, Moscow, and San Francisco.
Location: Earth
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Submarine Reaches Island — The Gohten team travels by submarine to the island housing the spacecraft.
Location: Island spacecraft base
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Island Base Attacked — UFOs attack the island while the Gohten is being completed.
Location: Island spacecraft base
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Takigawa Kidnapping Attempt — Aliens infiltrate the base and attempt to take Takigawa away; Jimmy helps kill them and rescue him. Characters: Jimmy
Location: Island spacecraft base
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Gohten Launches — After the rescue, the crew enters the completed Gohten and launches against the UFOs. Characters: Jimmy
Location: Island spacecraft base
Venusian Deception
The Gohten travels toward Venus and discovers Terra's wreckage. An alien disguise leads to June's abduction, while Commander Hell explains the invaders' need for a new world.
Key Events
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Terra Wreckage Found — The Gohten encounters the wreckage of Space Station Terra while traveling toward Venus.
Location: Space near Venus
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Mikasa Impostor Discovered — A recovered corpse is revealed to be an alien in disguise.
Location: Gohten
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June Abducted — The disguised alien kidnaps June and escapes aboard a UFO.
Location: Space near Venus
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Hell's Warning — Commander Hell explains that his dying planet needs Earth for the alien race's survival.
Location: Gohten communications system
Sacrifice At The Daimakan
The human landing party locates the alien base and attacks its defenses. Jimmy sacrifices himself so the others can enter, defeat the Space Beastman, and rescue June.
Key Events
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Daimakan Located — The landing party photographs the Daimakan but nearly dies under its laser fire. Characters: Jimmy
Location: Cave on Venus
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Force Field Assault — Humans attack the base through an air duct while fighters defend against UFOs. Characters: Jimmy
Location: Venusian alien base
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Jimmy's Sacrifice — Jimmy sacrifices himself to destroy the force field and enable the infiltration. Characters: Jimmy
Location: Venusian alien base
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June Rescued — The infiltrators suffer heavy losses, defeat the Space Beastman, and rescue June. Characters: Jimmy
Location: Daimakan
The Destruction Of Venus
The Daimakan cripples the Gohten, but Takigawa's hidden planetary weapon provides a final counterattack. His sacrifice destroys the alien ship and triggers Venus's destruction before the survivors return to Earth.
Key Events
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Gohten Crippled — The Daimakan uses a hidden energy beam, crippling the Gohten and forcing it to crash on Venus.
Location: Venusian space
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Planet-Destroying Bomb Revealed — Takigawa's recording reveals that the Gohten contains technology capable of destroying a planet.
Location: Crashed Gohten on Venus
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Daimakan Destroyed — Takigawa launches the detached drill-bow into the Daimakan, sending it into an active volcano.
Location: Active volcano on Venus
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Venus Explodes — The impact triggers a chain reaction that destroys Venus.
Location: Venus
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Gohten Returns Home — The remaining Gohten crew returns to Earth just before Venus is destroyed. Characters: Jimmy
Location: Earth