One month ago, the Four Swords failed in their attempt to defeat the powerful leader of the Dark Legion. As the youngest of the swordsmen quartet, Spark had to join the Dark Legion to ensure the safety of his brothers, Brisk and Blaze. Kai Hiro, the one destined to defeat HIM, was executed.Now, the unchallenged Dark Legion quietly builds their power, preparing for the day when their armies march across Japan and force their rule with hundreds of superweapons. But hope survives. Brisk, the leader of the Four Swords, has a plan to break out -- one that relies on his little brother not yet being corrupted. Meanwhile, a fallen hero trains on a distant island, preparing for a plan to stop the Dark Legion once and for all. In this action-packed finale, the bond of brothers will be tested, a shocking secret will be brought to light, and the Breaker Blade will be raised once more with all the hope and strength Japan has left.