Thread:Coolot1/@comment-4327179-20200523233851/@comment-4327179-20200523234558

Well here's the plot of the original and you can take your time to know what the original was like:

One night, a fishing boat in the waters just off Japan finds itself under attack by a Giant Octopus. Just before it can strangle one of the crewmembers to death with its tentacles, the monstrous cephalopod is attacked by a gigantic humanoid creature. After dispatching the Octopus, the giant begins violently attacking the boat and attempting to sink it. Sometime later, one surviving crew member is being held in a hospital. Representatives try to get the story of how the ship sank from him, but he says in terror that the ship was sunk by Frankenstein. The maritime authority is hesitant to believe that the ship was sunk by this "Gargantua," and dispatches divers to investigate the shipwreck. They uncover the clothes of all of the other four crew members, which are soaked in blood and look as though they were chewed up and spit out. Another boat soon falls victim to the Gargantua and a group of civilians finally witnesses the creature emerge from the water as they try and bring in a fishing net. The maritime authority contacts Frankenstein expert Dr. Paul Stewart in Kyoto to ask him if it is possible the Gargantua is the Frankenstein he raised at his institute. He dismisses the notion, stating Frankenstein died at Mount Fuji and would never live in the sea nor eat humans. Furthermore, reports of huge humanoid footprints in the Japanese Alps have led Stewart to investigate along with his assistant Akemi Togawa, while their colleague Dr. Yuzo Majida travels to investigate a salvaged shipwreck believed to be attacked by the Gargantua. Stewart and Akemi find the footprints in the mountains and accept the possibility they were left behind by Frankenstein, while Majida finds a mucous membrane left behind on the shipwreck. Analysis of the membrane shows that the creature's cells are almost identical to Frankenstein's, and the JSDF determines that Frankenstein must be behind the attacks. On a cloudy day, the Gargantua comes ashore at Haneda Airport and terrorizes the fleeing civilians. When the sun peeks through the clouds, the Gargantua immediately runs back to the sea, which Majida determines must mean the monster is averse to bright lights. The three scientists attend a conference in Tokyo to discuss countermeasures, but Stewart is still of the belief that the Gargantua in the sea and Frankenstein are different individuals.

That night, the Gargantua comes ashore in Tokyo and menaces a lounge singer before making his way into the countryside. The JSDF approves Operation L, a plan to use electromagnetic weapons including the newly-developed Type 66 Maser Cannon to kill the Gargantua. The plan is carried out, with electrical tripwires firing at the monster's legs before the Masers unleash their electromagnetic rays on the Gargantua. The beast tries to retreat to a river, but finds the water electrified. Just as the JSDF has the Gargantua at their mercy, a brown Gargantua emerges from the forest and helps the other up. The brown Gargantua waves off the JSDF and helps his green counterpart to safety. Stewart and Akemi conclude that the brown Gargantua, designated "Sanda" by the JSDF, is the kindly Frankenstein they raised. Analysis of tissue recovered from the green Gargantua, Gaira, shows his cells are identical to Sanda's. Majida proposes that the two Gargantuas are brothers, with Stewart saying the analogy is not far off. He proposes that when Sanda escaped their lab and went to Lake Biwa, some of his flesh tore off on a rock and grew into Gaira. While the kindly Sanda grew up in the mountains and was raised lovingly by Akemi, Gaira grew up in the dark depths of the ocean and became a hateful, violent beast. Stewart says the Gargantuas are more like clones than brothers, and determines that any attack against them runs the risk of spreading their cells which could then regenerate into more Gargantuas.

Sanda has taken his brother to the mountains around Mt. Fuji where he helps tend to his wounds. Akemi and Stewart head to the area to look for the Gargantuas, but come face-to-face with Gaira as he menaces a group of hikers. As Akemi and Stewart flee, Akemi falls over the side of a cliff and hangs on a tree branch for dear life. Before she falls into the rocky rapids below, Sanda hears her screams and rescues her, breaking his leg in the process. Akemi is overjoyed that Sanda recognizes her, and watches as he limps away. When Sanda returns to Gaira, he finds his brother sleeping next to the bloody clothes of the hikers he attacked. Sanda is horrified at the revelation his brother preys upon innocent humans and strikes him with a tree in rage. Gaira awakens and the two Gargantuas battle, with Gaira running away and Sanda unable to give chase on account of his broken leg. Gaira storms through the Fuji area and retreats to the sea before the JSDF can carry out its plan to destroy the Gargantuas. Most troubling is that Gaira seems to have lost his aversion to light, meaning he could attack Tokyo again. This comes to pass as Gaira enters the city once again, with Sanda converging on his location. The JSDF approves plans to attack both Gargantuas despite Stewarts protests. Akemi runs into the city streets to find Sanda and warn him to leave, with Stewart accompanying her. The two are soon menaced by Gaira, who grabs Akemi in his clutches. Fortunately, Sanda arrives and prompts Gaira to drop Akemi. Sanda tries to reason with his brother to end this senseless violence, but Gaira retaliates like a cornered animal and attacks his brother. Sanda continues fruitlessly pleading with Gaira, who continues lashing out. finally, Sanda accepts that his brother cannot be saved and fights back. The JSDF opens fire on Gaira as the war of the Gargantuas moves toward the port, their Maser Cannons sustaining fire on the green Gargantua. Both monsters fall into Tokyo Bay and continue their duel, gradually moving into the open sea. Planes drop bombs on the battling Gargantuas, but this activates an undersea volcano which begins to erupt. Both Sanda and Gaira continue to fight as they vanish amid the massive eruption. Majida finds Stewart with Akemi at a hospital and reports that both Sanda and Gaira appear to have perished in the eruption, though neither of their deaths could be confirmed. Akemi is heartbroken at the loss of Sanda, who gave his life to defend humanity.