For their summer break homework, the Ninningers are sent to a hidden village only ninjas can enter. The castle inside the village is threatened by Kibaoni Army Corps' Samurai Lord, Juza Yumihari. His mission is to locate the "Evil Dragon" said to be found in the village's castle. That being said, the lord of the castle was turned into a dinosaur due to a curse. Could this mean that the lord is this "Evil Dragon" Juza is looking for?