After the endless rain, the shadow of the Dark Dragon finally dissipates over Tokyo, bringing clear skies and a moment of peace. But the work of the Hayabusa and Raven ninja clans is never over, and chaos threatens the world once more. A mysterious foe seeks to tear open a doorway to another dimension and transform our world into a living nightmare. With the Divine Dragon Order in shambles and powerless to combat the new flood of fiends, two master ninjas must rise to the challenge. Step into a new chapter of the Ninja Gaiden 4 saga as Yakumo and Ryu Hayabusa join forces to combat new enemies and save humanity once again.