One possibility is that Sakura was betrayed by someone she trusted. This person made it seem like she had committed a heinous act, leading to her imprisonment in Oto Prison. Over the years, she could be plotting her revenge while also trying to find a way to prove her innocence.
Perhaps Sakura was sent to Oto Prison as part of a secret mission. She could be there to gather intelligence on Orochimaru or some other dark force operating within the prison. During those years, she would have to blend in, keep her true identity a secret, and find ways to send the information back to her village.
Well, it could be that Sakura was wrongly accused. Maybe there was a conspiracy in the ninja world that framed her for a serious crime she didn't commit, and as a result, she was sent to Oto Prison for years. There she might have had to endure harsh conditions and deal with all kinds of difficult inmates.
In fanfiction, Sakura could have been at Iwa prison for years due to her own curiosity. She might have heard rumors about some powerful or ancient jutsu hidden in Iwa. So, she decided to break into Iwa to find out more. But she got caught and was held prisoner for years. During her time there, she could have learned a lot about Iwa's culture and ninja techniques, which would make her an even more formidable shinobi when she finally gets out.
She probably became more resilient. Years in a prison like Oto Prison would have toughened her up. She would no longer be the naive Sakura from before. For example, she might be more cautious about who she trusts.
One possible plot could be that Sakura is wrongly imprisoned in Kirigakure prison. She might have to use her medical and combat skills to survive among the dangerous inmates. Maybe she is there on a mission to find a hidden secret or rescue someone else who is wrongly accused.
Well, she might face various challenges. Maybe she has to find a way to escape from the prison's dark magic or deal with some dangerous inmates. It could also be that she discovers some secrets about the prison while trying to survive.
The plot of 'sakura was at owa prison fanfiction' could involve Sakura being sent to Owa prison as a punishment for a crime she may or may not have committed. Once there, she discovers a hidden underworld within the prison. There could be secret groups, power struggles, and she might find herself in the middle of it all. She may use her unique skills, whether they are combat - related or her wits, to survive and maybe even expose the dark secrets of the prison.
One of the potential allies could be Jiraiya. Even though he has his own ties to Konoha, he might see Naruto's leadership in Oto as a way to bring about a new balance in the ninja world. Also, some of the more open - minded members of Oto itself could become Naruto's allies. They might be impressed by Naruto's leadership skills and his vision for the organization, which could be different from what Orochimaru had in mind.
She might have faced many challenges. Maybe she had to deal with difficult inmates or strict prison rules. It could also be that she formed some unexpected alliances in there.
Perhaps there are allies that help Sakura escape. They might be other characters who have also been affected by the sound prison in some way and they team up with her. They could use their combined skills to find a weakness in the prison's defenses.
One possible plot could be that the Kage of Oto has a secret alliance with Naruto. They work together to uncover a hidden threat to the ninja world that neither of their villages could face alone. This would involve a lot of intrigue, as they have to keep their alliance a secret from others who might not trust the Kage of Oto.
I'm not sure specifically as there could be many different takes on it. It might be about a character named Sakura who is in a place called Mist Prison. Maybe it involves her experiences there, like facing challenges, meeting new characters, or trying to escape.