The Vader Clan's scheme to poison the Denziman with a deadly gas becomes sabotaged when Demon King Banriki decides to use the plot in his own plot to take over the reigns as leader! 

The Denziman must figure a way to stop the power of Demon King Banriki and his Banriki Monster from terrorizing the world, even if they need unlikely assistance to finally bring their battle to an end.