The advertising director of a pharmaceutical company seeks to boost the ratings of their sponsored TV program by capturing the legendary monster King Kong just as Godzilla re-emerges.
Original Japanese version. Tako, advertising director of Pacific Pharmaceuticals, is frustrated by the low viewership of their sponsored documentary show and realizes that he needs a more sensationalist approach. He orders two of his men, Sakurai and Furue, on an expedition to Faro Island to investigate a legendary monster called King Kong and exploit it for advertising. Just as the expedition is underway, Godzilla emerges from an iceberg and sets his sights towards Japan, sparking a media frenzy that steals publicity away from Tako's own monster. As Kong is captured and hauled back to Japan, people begin to wonder which monster is stronger and capable of beating the other. Tako realizes the marketability of King Kong facing off against Godzilla as the two monsters are pitted against each other in the biggest wrestling match of all time.—Plotjira
Tako, advertising director of Pacific Pharmacuticals, is watching the educational documentary series that their company is sponsoring. Bored by the program, Tako calls on his assistant to discusses the show's low viewership as it reports on a U.N. submarine called the Seahawk that is being sent to the Artic to investigate a mysterious rise in temperature. The submarine crew spots an iceberg emitting a strange blue lights that resembles Chekhov radiation.
Tako meets with his TV employees Kinzaburo Furue and Osamu Sakurai to lift their TV ratings. Discussing with the company botanist, Tako inquires about the story of a legendary creature said to inhabit the South Seas Island of Faro. Tako believes that the story will hook TV viewers and decides to send Sakurai and Furue on an expedition to Faro. Later that night, Sakurai has dinner with his sister Fumiko and talks with her boyfriend Kazuo Fujita. Kazuo shows Sakurai the super strong wire he's invented as he's about to set sail to test his invention. They read up on the Seahawk's expedition which has collided with the iceberg. Back at Pacific Pharmacuticals, the company prepares a farewell party for Sakurai and Furue as the meet with Fumiko and her friend Tamie. As Tako prepares a press conference, all of the reporters leave due to the breaking story of the Seahawk.
Sakurai and Furue arrive on Faro Island and get captured by the natives. The pair bargain with the native chief, who agrees to let them stay, but takes no responsibility if their monster god eats them. A thunderstorm forms as a monstrous roar is heard. In the Artic, a helicopter is sent to search for the Seahawk. As the pilots arrive to the iceberg, they witness it crumble as Godzilla emerges from it. Godzilla then proceeds to attack a nearby military base as the Japanese Defense Agency is alerted. Godzilla's reappearance saturates the media, with Tako frustrated that Godzilla is stealing publicity away from his own exploits.
On Faro Island, Sakurai and Furue's exploits are interrupted by a thunderous roar and a landslide that forces the expedition back. Back at the native village, Furue develops a fever as an native boy is sent to get some berry juice as medicine. A giant octopus soon attacks the village. As everyone attempts to repel the monster, the legendary monster, King Kong arrives. The octopus is quickly defeated by Kong who then proceeds to drink some of the berry juice. Kong falls asleep inebriated as the natives celebrate. Sakurai and Furue decide to build a large raft and haul Kong back to Japan. Back at Pacific Pharmaceuticals, Tako is celebrating all the publicity King Kong's capture is generating. As he prepares to fly out and see the beast, his employees begin to wonder which monster is stronger. Tako overhears this and expresses his approval of the idea, realizing the marketability potential of pitting King Kong against Godzilla.
Tako lands on the ship transporting Kong and discusses his plans to create ads with Kong only for a Japanese destroyer to arrive and warn Tako that Kong cannot enter Japan. Kazuo arrives from his trip and meets with Tamie. He learns that Fumiko has boarded a train in search of him. Kazuo races off to rescue Fumiko as Godzilla attacks the expressway she's on. Kazuo rescues Fumiko as Godzilla continues his rampage through Japan. Back on the ship, Kong begins to wake up as Sakurai attempts to let go of Kong by detonating bombs wired to the monsters' raft. Tako tries to stop him as Sakurai and Furue fire their rifles and successfully blow up the raft. However, Kong survives and makes his way towards Japan. Kong meets up with Godzilla in the Nasu area as Tako, Sakurai, and Furue try to avoid the JSDF and observe the confrontation. Godzilla and Kong roar defiantly at one another as Kong hurls massive boulders at his opponent. Godzilla retaliates with his atomic breath and forces Kong to retreat in a bemused state.
The JSDF begin their countermeasures against Godzilla and Kong. After they fail to trap and blowup Godzilla in a giant pit, they complete their efforts to setup high-tension wires around Tokyo as a defense. The electric barrier is charged with a million volts of electricity and successfully manages to deter Godzilla. Kong on the other hand manages to break through the barrier and feed on the electricity. Tako and his men look on, nearly gets into a fistfight over an argument, as Kong rampages into Tokyo. After halting a train, Kong kidnaps Sakurai's sister Fumiko. With Fumiko in hand Kong scales the National Diet Building, causing Sakurai and Tako to develop an idea to knock out Kong with the berry juice. With Fumiko saved, it is then suggested to pit Kong against Godzilla, Tako approves but realizes the intent is for the monsters to kill each other. Kazuo's wire comes into play as the JSDF prepares an airlift to transports Kong to Mount Fuji.
The next morning, the transport reaches Godzilla and Kong is dropped right on top of the monster. The rematch between the two monsters begins. Kong attempts to surprise Godzilla before he's forced to grappled with the atomic beast. The two monsters tussle down the slop of Mount Fuji before Kong slips and knocks himself unconscious. As Godzilla kicks boulders into Kong's face, the ape attempts to attack but is knocked out by a kangaroo kick from Godzilla. Sakurai and Kazuo observe from their helicopter as they notice a thunderstorm arriving. Sakurai notes how lightning will empower Kong with electricity. Struck by a bolt of lightning, Kong proceeds to beat Godzilla down as the ape gains the upper hand. Kong manages to force a tree down Godzilla's throat and tosses the monster over his shoulder. The beasts continue their battle as Tako arrives to see the outcome.
Both monsters make their way to the coast and arrive at Atami Castle, which they then proceed to tear apart. The two beasts plunge into the ocean and generate a small earthquake. Everyone looks on as Kong is the only monster to surface. They speculate on Godzilla's fate as Tako reluctantly agrees to let Kong swim back to Faro. Victorious, Kong begins his long journey home.
