In the world of Gamninjustri, the four goddesses, who are all portrayed as ninjas living in the nation of Heartland, are in a never-ending feud against the nation of Marveland for hegemony. However, Yoh Gamer, a ninja master and the leader of the group Steeme Legion, threatens to take over both nations with an army of mechanical ninjas and announced to start of a new war called the Super NINJA War. With the threat looming closer, the ninjas from both Heartland and Marveland decided to join forces to not only stop Yoh Gamer and her army but to prove who has the most powerful school in the world.