On the streets of Mega Tokyo it takes a special kind of heroine to fight the hardwired forces of chaos. Dedicated to justice, the vigilante Knight Sabers; Sylia, Priss, Nene and Linna, defend the city against the cyber-conspiracy that threatens to engulf it. Can woman and machine put aside their differences to destroy the secret hidden in the heart of Geo City? The Knight Sabers come face-to-face with an indestructible enemy, as they at last uncover the mastermind behind their recent adventures. But the final plan for the annihilation of the city of Mega Tokyo has begun, with an out-of-control drilling machine set on collision course with the biggest nuclear reactor in Japan. Sylia and her team are about to meet their match in their most dangerous foe to date and if they lose, the melt down begins.