Naruto entered the Uzumaki temple pulling the two unconscious chunin with him and Karin followed looking around with some sense of deep familiarity. After they entered the temple, Karin just stood in a corner near a wall and watched Naruto who took out a brush and some ink and started writing some weird runes on the floor. Naruto was not too proficient in sealing techniques and only started learning the advanced fuinjutsu. So he couldn't still write using his chakra and needed to use a brush and fuinjutsu ink that his mother Kushina had left in the Namikaze compound.
After writing different runes on the floor around the two unconscious chunin, he performed some hand signs and slammed his hands on the two of them. Suddenly, the writings on the floor converged on their bodies and their bodies became stiff. This was a stasis seal. He wanted the two of them to be in stasis until he is ready to perform the impure world reanimation jutsu. He looked at both the chunin in stasis and smiled at the job well done. At this time, Karin couldn't hold on any longer and asked "Uh!....Can I know your name please?"
Naruto without even looking at her replied "Uzumaki Naruto". Hearing his name made Karin shocked and she stuttered saying "Y-you a-are Uz-Uzumaki as well?" then moved near the wall stunned and placed her hand on the wall. The wall had a sharp edge protruding out of it which pierced her hand as she yelled "Ouch". And retracted her hand. But her blood had dropped on the wall already and the temple started shaking. Feeling the shake, Naruto turned over and looked at her. Karin seeing his gaze, suddenly said "It was not me. I didn't do anything". Naruto just Shhhhed her and looked behind her.
The wall cracked and separated slowly and opened up a path behind Karin. Karin also turned back and witnessed the path that formed behind her stunned. Naruto walked towards the path and inspected it. He then moved along the path as Karin followed him behind. As they moved through the path, Naruto saw a seal at the end of the path. He then pricked his finger and dropped blood on the seal and the seal glowed then a hologram of a person with red hair appeared.
The hologram then spoke "Descendants of the Uzumaki, welcome to the Uzumaki clan library and storage. This is the legacy that we left for our future generation Uzumakis who might have survived the attack and returned back safely at some point of time. Inside are all the knowledge and researches of our ancestors of Uzumaki clan stored away to be safe from the world and only accessible to someone with Uzumaki blood. We Uzumakis were peace loving people and didn't interfere in any conflict, but the five ninja villages betrayed and attacked us fearing our powers and to get their hands on our legacy I.e. the Fuinjutsu skills we possessed.
Konoha betrayed us and helped the other villages attack us by divulging our weaknesses. The proud Uzumakis fought bravely until the very end and learning that winning is impossible, we helped some of our remaining members to escape and sealed all the fuinjutsu scrolls passed down from our ancestors and other weapons and seals and all treasures we had inside the Uzumaki library in hope that an Uzumaki will eventually find them and use them to get revenge on the five great villages and hold the legacy of the Uzumaki to continue and rebuild the clan once again. We hope that the things we left here will be helpful in your venture brave Uzumaki descendant".
Saying what it wanted to say, the hologram turned into specks of light and disappeared showing a huge door. Karin was stunned hearing about the Uzumaki clan's demise and put everything together and came to know that this place was the Uzumaki clan ruins. She then looked at Naruto with a complicated gaze and spoke "Um- Naruto san, I'm also an Uzumaki. My name is Uzumaki Karin. Are we in the ruins of the once Uzumaki village?" Naruto nodded "Calling me Naruto is just fine. This place is the Eddy village where once the Uzumaki clan lived. I had come here for some other business, but now found this hidden library thanks to you. Now let's go in and take a look at what's inside".
Naruto then opened the door and walked inside only to find a huge ass room filled with scrolls, books, weapons, gold, gems and all kinds of stuff and treasures. Both Naruto and Karin were stunned witnessing all the items inside. Naruto thought 'The Uzumakis probably at the end of being defeated might have moved all their possessions and wealth inside this building and sealed it hoping to hide all this stuff from other greedy villages. There is enough money and stuff here to start a whole hidden village. In the original they never found this place as it was Orochimaru and Sasuke along with Juugo and suigetsu that had come here and an Uzumaki was not present with them.'
Thinking of this, Naruto started examining the scrolls section which contained lots and lots of fuinjutsu scrolls. Naruto was beyond excited to learn all these things. There were also various Ninjutsu, Genjutsu and Taijutsu scrolls as well. There was a separate section that contained scrolls of the Senju clan. Naruto then decided that he'll stay here for the next three years and grow his strength until it's time for his clone to graduate in the academy.
Karin was also surprised, but Obidiently stood on a corner and watched as Naruto examined everything. She knew that even if everything here belonged to the Uzumaki clan, Naruto was also an Uzumaki and also strong and she was not in a position to claim anything here. Also even if she takes the treasure out of here, she will be hunted down by bandits or any others as she was weak. She knew that Naruto is her only protection as he could kill the grass Jonin in one shot. She had also sensed the darkness inside Naruto and also the loneliness in his heart which never trusts anyone and will do anything to get what he wants. So she first planned to get him to trust her and change his nature.