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The next morning came when Sakura and the rest of the group were giving medical assistance to the citizens and shinobi. She goes to different spots one at a time to cure the sickness and extract the poison out of their bodies.

"I'm here to express my gratitude for your hard work, Miss Haruno," a 40-year old mother said tearfully in joy. "You saved me and my son."

"Thank you so much," the brown-eyed boy beamed cheerily at her.

"Haha. You're very welcome. It's myduty to make sure that everyone is in good health," the pink-haired kunoichi reminded gently.

"Hm. You really are one of Lady Tsunade's wonderful apprentice. You both have phenomenal healing skills," the young man said smiling in giddiness, much to most people's agreement.

"Yeah! You are the best!" One of the young men called out when everyone in the room started clapping in applause.

Sakura laughed nervously and swatted her hand slyly, saying. "Hehe. Thanks, guys. I appreciate that."

"It seems that the medical kunoichi is diligent and busy these several hours," a familiar voice said smirking coolly.

"Kankuro. You're here. Aren't you supposed to go on rounds with Temari?" The pink-haired kunoichi asked curiously.

"Well, I am. I'm just taking a 15-minute break. It's tiring to always check the air conditioning vent, gas pipes, doors, and glass windows to be completely shut closed. Of course, the outside is under the investigation of how the poisonous gas started," Kankuro explained thoughtfully with his fist holding up his chin.

"I see... After this, I can go with you guys," Sakura said.

"Unfortunately, you can't. As much as we want to, Kazekage Gaara has assigned you to a differenttask with Naruto. Since he is not available to go with you guys, he expects you two to find evidence," the purple-faced ninja pursed his lips firmly.

"Alright. No problem," Sakura closed her eyes with a smile that almost faltered.

"Great! Now, I'm going to go and informed him about this. Thanks, pinky," Kankuro said as he gave her a small pat on the shoulder. He turned around and told the others that he will be back to see the results later. He slid the door and closed it behind him, leaving Sakura in her own thoughts.

"I don't understand..." the pink-haired kunoichi frowned in mind.

"Miss Haruno, we already completed the third step of the lung transplant procedure," one of the medical nurses informed her formally while holding onto the check board list. "Shall we move it now?"

"Yes. Prepare the surgical instruments and activate the CT-scanners, STAT," the pink-haired kunoichi instructed softly as she head towards the three patients at the back of the room along with the nurse behind her.

Inside one of the tunnels, Temari has been checking the pipes using her own flashlight and one of the miners stopped by to ask her.

"Hey, ma'am. Is there anything that you need help with?" He looked at her blankly.

"Hmm. Yeah, I'm good. I'm trying to ensure that none of the toxic gas infiltrates through this tunnel and the rest," Temari answered as she began to look at him and question. "By the way, do you and your co-workers have any idea how it started transmitting our village?"

"No. Sorry. But there is someone that we saw the moment before this dilemma began," the miner said thoughtfully.

"Okay, go on," Temari urged him to explain.

"I was with my other friend six days ago at someplace. It's really huge than this small tunnel. More like a cavern," he stated in details and continued on. "We were digging some coals and other pieces of rocks there until we saw something strange in the midst. It's black."

"Black? In what shape or form?" Temari asked suspiciously.

"I don't know. Hiding is a place for people to go to, but they always come by to surprise," the miner quoted as he started whistling and continues to push the coal cart with him. "See you later, ma'am."

"Alright. Thanks for the info," Temari said, waving farewell at him and sighed.

"So I guess there is something erratic going on," Kankuro said quietly.

The ponytail-haired kunoichi glanced around and faces her brother, saying. "Yeah, well... I don't know if Gaara will believe this from us if we told him about what the miner had said before."

"You're right. He sometimes doubts other people's words since he prefers to see their more of actions," the purple-faced ninja noted.

"I suppose. But what are we going to do? I mean, Sakura is occupied on medical treatments for the people. And Naruto and Shikamaru have already been assigned to join the H2O crew to eliminate the gas," Temari mentioned.

"Well, it leaves us no choice then," Kankuro said when he started to smirk intently with an idea popped into his head.

"Huh? What do you mean?" Temari asked him and continued on, saying tiredly. "Oh, jeez. If it's one of your sneaky schemes, I certainly will not tolerate that."

"Hey, hey, hey. Relax, Tem. It's not. Alright? Listen, the only thing we have to do is figure out where and how we can get through that place," the purple-faced ninja whispered quietly and continued on. "The miner did mentioned something about a cavern, right? So that must be where the gas is coming from."

"Right. But again, we do not know what's inside that place. Nobody has gone there since 32 decades ago. If we go in there, obviously we might get lost. It's crumbled into pieces of mess and all ancient history, Kankuro," Temari pointed out logically.

"How do you know for sure if the cavern has been collapsed? You can't just guessed and make that a fact," Kankuro stated correctly.

"And what do you think that we can do? Just goo in there without having Gaara's permission?" The ponytail-haired kunoichi questioned firmly.

"That's the first. And second, we are just going to do some research on what this cavern is all about. If those things that you said are right, then we can still find a way. If not, then we got to wing it," the purple-faced ninja suggested.

"And how are we going to do the research? We don't have books. Almost the traditional ones are not significant in today's history," the ponytail-haired kunoichi said.

"But some of them are being kept, regardless of how old or new they are, which is why I know..." Kankuro said smirking.

"Know what?" Temari asked in puzzlement and confusion until she stared at him for a few seconds when she realized what he had already discovered and warns him. "No... You didn't actually sneak into one of Gaara's rooms, did you? They are monitored 24/7 if anyone tries to go in. He will ground you if you touched one of his books. They are private."

"Hey. All I had to do was disguised as one of his security guards. It's not difficult to do that. Plus, there's no way that Gaara would ground me. Come on, he may be the Kazekage, but he will still be a little brother to me, ya know," Kankuro chuckled in amusement.

"Ugh. I swear, if anything goes shitty, I will definitely hunt you down. You know what, let's try this plan of yours," Temari sighed as she raised an eyebrow dully.

"Okay! Good! Now, let's finish this rounds as quickly as possible," Kankuro beamed with a secret smirk.

Just when they started patrolling around the tunnels for couple minutes, the clock strike for half an hour at noon, which was lunchtime.

The next thing that the two older siblings went is attempting to sneak in one of younger brother's rooms. From there, both of them

were trying to find the history book that was kept away by their red-haired Kazekage.

Kankuro and Temari disguised as one of the guards and decided to use a justu that will make them invisible to eyes of others, including Gaara's third eye. They got themselves covered completely with blankets individually.

Inside the room, Kankuro was checking the book shelves and table drawers on the corner hastily while Temari was helping him out.

"Damn. You sure this is going to work?" The ponytail-haired kunoichi asked doubtedly.

"Temari... Trust me. It's somewhere in here. I just forgot where he put that book," Kankuro replied impatiently, rummaging through the documents and materials carefully. He looked up at the ceiling and noticed that there was a keyhole near to the lighting area. "Hey... Maybe, it's on the top."

"Jeez. We need a key," Temari gazed at him annoyingly.

"Shit... Hold on. I can use my homemade ones," Kankuro said grinning as he slowly pulled out the stick with a signature key and placed it on the hole correctly.

The lid slid opened and they both hopped onto the desk and hovered right inside the area itself as they started to glanced around the attic.

"Say... This is Gaara's another room," Temari muttered in awe at the beautiful display.

"Yeah, it's very vibrant alright and plus he even has kept a journal himself. Anyway, before we get into that, the history book is just on that book shelf right there on the second row," Kankuro pointed to the direction as they walked over to it. He pulled it out and started skimming over the pages until he reaches onto the middle one where it has all the mysterious 7 locks.

"What are those? They're so bright. I could barely see what's in them," Temari asked curiously in surprise.

Kankuro answered gently. "Yeah... Those are the hidden keys."

"Wait, what are they doing in there, then?" She asked suspiciously.

He replied as they both continue to stare at the keys without even breaking their contact on them. "That's what we are about to find out."

TO BE CONTINUED...