Professor Zark is an evil entity who mobilizes an android army to conquer the world. Dr. Zenmeiji, a robotics expert who fights for justice, resolves to create the cyborg warrior Miraiider Sayaka. However, just before completion, Zark's androids interfere, forcing her into battle with an incomplete justice circuit. Sayaka confronts wave after wave of attacking androids, attempting to transform into Miraiider, but falls victim to Zark's demonic flute, driving her mind into madness. Adding further torment, Androidman subjects Sayaka to lewd and depraved torture. Desperately resisting, Sayaka finally breaks free when the sound of the demonic flute vanishes, shouting, "Now's my chance! Change Miraiider—Switch On!" A fierce battle then erupts between Miraiider Sayaka and the evil cyborg Psycho Guilder, but ultimately, Miraiider Sayaka is defeated. Psycho Guilder brutally ■■■■ the incapacitated Miraiider, while Professor Zark moves in to dismantle her completely. Don't give up, Sayaka! Once again, play the righteous melody of the guitar!