After saving Momoninger from getting destroyed by a laser beam, the other Ninningers showed up. Kuroninja had returned, because he heard about Anti-Kuroninja trying to take the Nin Shurikens, and he wanted to help. Aoninger asked Kuroninja how he could help. Kuroninja said that he was going to guard the Nin Shurikens by keeping them safe in his own house.
"Are you sure this is a good idea?" Aoninger asked.
"Don't worry," Kuroninja said. "No one has ever broken into my house, and besides, nobody even knows where my house is!"
Kuroninja lived somewhere in the woods nearby. His house was a small cottage with a wooden floor. Kuroninja entered the house, holding 6 Nin Shurikens that he was supposed to protect. First he needed to find a place to put them. Kuroninja went inside his bedroom, which had 2 beds. One of them had black bedsheets, and the other had purple bedsheets. Kuroninja would usually sleep on the bed with black bedsheets. However, there wasn't anywhere for Kuroninja to hide the Nin Shurikens.
Since Kuroninja was unable to find a hiding place, he went to the dining room, where there was a small, yellow wooden table surrounded by four seats. Kuroninja sat at this table and decided to just leave the Nin Shurikens on the table and find a good hiding place tomorrow. After all, his house was very hard to find, since it was protected by the woods, and it had never been broken into before.
Meanwhile, Sledge was desperate to get the Ninja Power Stars, since Anti-Kuroninja promised to give him an energem. Wrench, the mechanic of Sledge's crew, asked Sledge if getting the energem from someone he hasn't even seen before worth it. He then supposed that the energem could be fake, and Anti-Kuroninja could be using Sledge for something. Sledge dismissed Wrench, because he wanted that energem. He then sent one of his prisoners to Earth. This prisoner was covered in a white cloak, almost making him look like a jellyfish or a ghost. The Ghost Monster went to Earth to try and get the Ninja Power Stars.
On earth, the Ninja Steel Rangers saw reports of a ghost-like monster attacking the streets. They decided to go after the ghost monster. The ghost monster saw the rangers, and recognized them from watching Galaxy Warriors while he was waiting in one of Sledge's cells. The Ninja Steel Rangers summoned their ninja battle morphers and announced "Power Stars, Lock in!"
They placed their power stars, which looked similar to the Nin Shurikens, onto the morphers. Then they spun the shuriken, while at the same time, announcing "Ninja Spin!" The Ninja Steel Rangers charged at the ghost monster, with their swords ready to attack.
On the other side of Earth, it was night. Kuroninja thought he heard something, so he got out of bed and went to investigate what was going on. He didn't see or hear anything, so he went back to sleep.
The next day, Kuroninja went to check on the Nin Shurikens, which he had placed on the dining table. Kuroninja went to the dining table and saw that all the Nin Shurikens were gone. Nobody had broken into their house before, so Kuroninja thought that maybe they disappeared, or his apprentice somehow moved the Nin Shurikens somewhere else. But Kuroninja's apprentice/roommate was still sleeping. That was when Kuroninja looked very closely at the table and saw some yellow fibers. He got the yellow fibres and put them in a small pouch, but that didn't tell Kuroninja what happened to the Nin Shurikens. The yellow fibres could've been stolen by someone wearing yellow, but that wouldn't explain how they found Kuroninja's house.
What Kuroninja could at least do was apologize to the Ninningers for thinking that he could take care of everything himself, so he walked to the Ninningers' place.