The series picks up four years after the events of Terminator 2: Judgment Day with John and Sarah Connor trying to stay under-the-radar from the government, as they plot to destroy the computer network, Skynet, in hopes of preventing Armageddon.

西暦2032年。各種産業や人種がひしめく超過密都市・メガロシティTOKYO、略してメガ東京。かつて東京都と呼ばれていたそこは、7年前に発生した第2次関東大震災からようやく復興を果たし、そこに住む人々は再び平和を迎えていた。しかし、一方で、現在の街を支配する超集合企業体・ゲノムと、街に蔓延る非合法の亜人ブーマが人々に襲いかかる。警察の介入も断絶される中、ランジェリーショップのオーナー、シリア達美女4人は、ハードスーツを身に纏い、闇の仕置人・ナイトセイバーズとして、メガ東京の夜を駆け抜ける…!

Sonic, Sonia, and Manic are the children of Queen Aleena Hedgehog, the rightful ruler of Mobius, and are pursued relentlessly by Doctor Robotnik and his bumbling bounty hunters sidekicks, Sleet and Dingo. As infants, the siblings were separated and placed in hiding to fulfill a prophecy made by the Oracle of Delphius that the triplets would grow up to find their estranged mother, overthrow Robotnik, and take their places once more as Mobius' rightful rulers.

As the fearless leader of a group of freedom fighters, Sonic attempts to free the citizens of Mobius from the tyranny of the evil Dr. Robotnik.