A new type of Boomer with advanced AI is stolen! Now it's up to the newly re-formed Knight Sabers to get it back! However, they'll have their hands full with a group of Combat Boomers headed by a criminal scientist who is vying for the end of the Sabers.

Boomers all over MegaTokyo are rioting and throw the city into chaos. In order to stop this disaster, the Knight Sabers must locate the mastermind behind it all!