SAYURI NAGISA and SATOSHI GO are captured by the evil organization Galza Army and surgically transformed into cyborgs Attack and Striker, but they escape before their brains are altered. Since then, the two have continued fighting against the Galza Army to protect world peace. One day, learning that the Galza Army is recruiting ordinary civilians, they launch a mission to stop the plan. Sayuri heads toward the group of civilians, only to discover they are actually a Reptilian alliance collaborating with the Galza Army. Unable to transform when facing humans, Sayuri is attacked by the Reptilian group and falls into danger. At that moment, a monster from the Galza Army appears, prompting Sayuri to transform into Attack and battle it. She manages to defeat the monster, but the fight drains all her energy, leaving Attack vulnerable to the Reptilian group Wyvern.