The giants, Kibaoni Gengetsu and a Mecha-Gashadokuro, were attacking the area. The Ninningers activated their mecha, which was known as Gekiatsu Dai-Oh. The Ninja Steel Rangers entered the Ninja Steel Megazord, before activating Ninja Master Mode.
Gengetsu Kibaoni was very powerful against Gekiatsu Dai-Oh, so the Ninningers summoned Lion Ha-Oh. Then they combined to make Ha-Oh Gekiatsu Dai-Oh.
Meanwhile, the Ninja Steel Megazord was having a very hard time against the Mecha-Gashadokuro. They tried to attack it with the Megazord's sword, but it was covered in metal, unlike the normal Gashadokuro, which were made of bone. The Red Ranger then noticed that Ha-Oh Gekiatsu Dai-Oh was about to finish off Gengetsu Kibaoni. Because of this, they pushed the Mecha-Gashadokuro in front of the Ninningers, who finished off the Mecha-Gashadokuro. However, they still needed to finish off Gengetsu, because the metal armour absorbed most of the energy from the finisher. Then they decided to do their finishers at once. The Ninja Steel Rangers and Ninningers performed a synchronized finishing attack, which destroyed Gengetsu Kibaoni. Gengetsu Kibaoni collapsed onto the ground and exploded.
When the Ninningers and Ninja Steel Rangers destroyed Kibaoni Gengetsu as a giant, they left their mecha and went outside. Kuroninja was there, sitting down by himself, witnessing the rangers as they took their helmets off. Kuroninja then decided to join. He began to take his helmet off...
...but then he stopped. Nobody could know what Kuroninja looked like. Kuroninja never took his helmet off in front of other people. Kuroninja then heard someone behind him, saying "That Midoninger Shuriken you're holding... I think it belongs to me." Kuroninja turned around, and he was surprised when he saw who it was.