Dan is a former geisha, now working as an ace pilot for the Earth Defense Troops. Her fiance was killed by the space monster Bemurasu which consumes nuclear waste. To save Planet Earth, Dan attacks Bemurasu, but whenever she does, she feels ecstasy. Can she save Planet Earth?
The story is set in a world where a tokusatsu hero TV series "Outer Man" has gained national popularity for 50 years (just like the Ultraman series). One day, a giant alien looking exactly like Outer Man appears in Japan. The truth is soon revealed that, unlike the story in the TV series, Outer Man is an evil alien who has been trying to brainwash Japanese people to invade the earth. The actors who played the hero in the TV series decide to fight against the real Outer Man by transforming into the villain alien in the series, Sylvie Seijin.
This roller-coaster ride includes kaiju, mad scientists, and humanoid robots, all seasoned with big, absurd humor and action-packed battle scenes.
Den Ace is a superhero who has defended Japan from space menaces for thirty-five years. When things seem to have calmed down, strange events prompt him to get back to action.
Tasuke Isshin is the 25th generation head of the Isshinya Fresh Fish Shop in Kota, and is an office worker at Choden Industries. He is a popular, kindhearted man who can't help but help people in trouble. Choden Industries is troubled by sabotage by Iwayama of the Owashi Conglomerate. Tasuke is shot down by someone on his way to work but is resurrected as the Cyborg Tasuke Isshin / Cyborg 1 Heart by the genius scientist, Managing Director Okubo! However, Iwayama has also become a cyborg called Cyborg Rock 1 and appears in front of Tasuke and attacks him! The true identity of the Owashi Conglomerate is the merchant of death, Blue Ghost! Will Cyborg Tasuke Isshin defeat his enemies?
