Tommy Aku è un reporter impacciato e pasticcione, che lavora in coppia con la bella fotografa Midori Ariyoshi, segretamente innamorata di lui. I due si occupano di fare servizi sulle discipline sportive più disparate; Tommy ha un rivale, Saiga, un giornalista geloso per l'interesse che Midori prova per lui. Un giorno, mentre il trio sta seguendo un torneo di judo al Nippon Budokan, un misterioso wrestler mascherato chiamato Uchu-Kamen SF fa irruzione e lancia una sfida ad Antonio Inoki, il più forte wrestler e capo della federazione di puroresu, la New Japan Pro-Wrestling. Qualche giorno dopo, Uchu-Kamen SF si presenta sul ring al Tokyo Metropolitan Gymnasium, sconfiggendo Seiji Sakaguchi davanti a tutti affermando di essere un campione della Space Wrestling Federation. Un bambino che era venuto a vedere il match, sale sul ring e cerca di colpire Uchu-Kamen SF, ma lui lo afferra e lo lancia tra il pubblico, dove viene salvato da un wrestler che indossa una maschera da tigre...

The Space Pro-Wrestling Federation begins to explore the identity of Tiger Mask. The defeated space mask science fiction approaches Inoki to rematch Tiger. But Inoki didn't know the whereabouts of Tiger... At that time, Tiger appears in front of Inoki and begins to talk about his true identity. There is also a huge evil shadow approaching in the Japanese professional wrestling world...

Space mask SF that lost the first game and burned with revenge. A one-game game between him and Tiger Mask was about to begin. In this game, each other's masks are supposed to be bet. As soon as the gong rings, the exchange of advanced techniques begins. The tiger that is gradually being driven into inferiority explodes with the special move of the space mask!

A terrible conspiracy was revealed by Space Mask SF. The Space Professional Wrestling Federation was trying to take over the Japanese professional wrestling world. Moreover, the Space Professional Wrestling Federation will immediately send in a second assassin. It's The Bat, which is good at simitling attacks. Bat defeats the popular villain wrestler Bigwood and forces Tiger to confront him!

Tatsuo begins to investigate the disappearance of some high school students, all of them emerged in various sports.

Tiger Mask II and the police rescue the boys from the ship.

Tiger Mask II takes Inoki by car to the foot of Mount Fuji by showing him, through the crack of the trunk of a tree, a pyramid, which for years has remained hidden by vegetation.

The match against Mister Who N ° 1 and N ° 2 is becoming a massacre, in fact they are dominating the match by attacking their opponents in two against one as Inoki and Tiger Mask II persist in fighting loyally.

At the airport Tatsuo meets Rita, a friend and American journalist.

Tiger mask faces iron mask but he notes that there is something familiar in the Iron Mask technique, equal to that of Rita.

The mysterious head of the Space Wrestling Federation decides to go personally to Japan to attend the tag match where their new masked wrestlers.

Tatsuo learns that Emir Arman Hassan, with whom Japan has entered into an agreement for the sale and purchase of oil, will come to Yokohama aboard his luxury ship.

Tatsuo is working out the counter-move with which to beat the Hawk of Hell

The day of the match against the Hell Hawks has arrived, Hassan also attends the match sitting in a front row seat.

Nobody welcomes the fact that Inoki and Tiger Mask II do not want to sell New Japan Pro-Wrestling to Hassan despite the fact that he threatens to no longer distribute oil to Japan.

Tiger Mask, attacked by Hassan's rugby team, remembers his youth in the United States, studied in New York and worked for a newsroom.

A helicopter lands on the Oil King, the passenger is Seido Muscle, a huge savage who will be the partner of Shinigami Silver in the upcoming tag match against Inoki and Tiger Mask II.

The tag match begins and Tiger Mask II faces Shinigami Silver whose build has claws and sharp horns with which it puts the opponent in difficulty.

Shinigami Silver and Tiger Mask II face off in a great match but are then interrupted by Geller and his hit men.

Tiger Mask II trains with Inoki asking him to fight alone against Seido Muscle.

The match begins but Seido Muscle does not suffer the attacks of Tiger Mask II thanks to his muscles.

Abdullah the Butcher, a strong and famous Canadian wrestler, wants to challenge Tiger Mask II in a match.

Butcher gives Midori a private interview and reveals his past, the humiliations and sufferings he has suffered but which he has overcome, in addition to the motivations that led him to challenge Tiger Mask II in a match to the death.

Butcher puts Tiger Mask II in difficulty with his fast karate techniques, despite the masked wrestler defends himself very well, but Butcher starts fighting not respecting the rules.

American wrestlers not finding it right that the Space Wrestling Federation only fights against New Japan Pro-Wrestling decide to come forward, in fact one of them, Stan Hansen, challenges Devil Puma.

The night of the match between Tiger Mask II and Devil Puma has arrived.

Tiger Mask II and Devil Puma face off in a match with no time limit, in a clash where both demonstrate that they have practically the same strength.

Tatsuo brings Giena to Hakone and then two helicopters arrive, which suspects Tatsuo in fact those are the hit men of the Space Wrestling Federation. Geller, accompanied by Devil Puma, tries to kill Giena.

Tiger Mask II continues to fight against Devil Puma, who puts him in serious trouble with his deadly karate moves.

Tiger Mask II reaches the ring for Battle Royale, then riding a horse comes Hakuma Knight, the second strongest wrestler in the Space Wrestling Federation.

Hassan proposes that the strongest wrestler in the Space Wrestling Federation fight against André The Giant.

Tiger Mask II and The Strongs continue to fight in an exceptional match.