Well, one possibility could be that Naruto is framed for a crime he didn't commit and sent to the Blood Prison. There, he might face all kinds of dangerous inmates and tough prison guards. He would probably try to prove his innocence while also having to deal with the harsh prison environment and maybe some secret plots within the prison walls.
One possible plot twist could be that Naruto discovers a hidden conspiracy within the Blood Prison. Maybe the prison is being used for something more sinister than just holding criminals. Another twist could be that Naruto's friends believe he's a traitor for ending up in such a place and he has to prove his innocence to them while still trapped in the prison.
It could be the warden of the Blood Prison. He might be a corrupt figure who is using the prison for his own gain. He sees Naruto as a threat to his operations and tries to keep him locked up at all costs.
The plot could involve Naruto being sent to the Blood Prison on a mission. Once inside, he encounters various types of ninjas with different abilities and motives. There could be a mystery surrounding a powerful and dangerous prisoner locked away deep within the prison. Naruto's journey in the Blood Prison could also be a test of his character, as he has to make difficult decisions about who to trust and how to handle the dangerous situations that keep arising. He may even learn some new jutsu from the inmates or discover a hidden power within the prison itself.
In the 'Naruto betrayed blood prison fanfiction', perhaps Naruto is betrayed first by someone he trusts inside the prison. This betrayal makes him take actions that are misinterpreted as him turning on the prison. It might also be that a new, powerful inmate arrives and manages to turn the situation around so that Naruto looks like the bad guy. He could be forced to fight against the prison guards to protect himself or others, which would be seen as betrayal.
In fanfiction, if Naruto gets sent to Blood Prison, he might face a lot of challenges. He could encounter powerful and dangerous inmates. Naruto would probably try to use his ninja skills and his strong will to survive. Maybe he'd also find some allies among the prisoners who recognize his strength and good heart.
It could be that Naruto is sent to prison as part of a political move. There are some ninja clans within the village who are jealous of his popularity and influence. They conspire to get him out of the way by making it seem like he's a threat to the village's security. In prison, Naruto discovers a hidden conspiracy within the prison walls that is related to the outside political turmoil and he has to find a way to expose it while also getting himself released.
Well, one possible plot could be that Deadpool somehow gets transported into the Naruto universe and ends up in the Blood Prison. Maybe he teams up with Naruto who is also trapped there. They could fight against the prison's corrupt system together and use Deadpool's crazy combat skills along with Naruto's ninjutsu.
In this type of fanfiction, the plot can be really diverse. It might start with Naruto being sent to the Blood Prison for some false accusations. Once there, he encounters various characters, some of whom are trying to kill him, while others might become his allies. The Blood Prison setting allows for a lot of exploration of Naruto's character in a darker context. It could also involve Naruto having to use his skills in new and creative ways to survive, and perhaps there's a build - up to a big showdown against the main villain or the corrupt forces running the prison.
He could use his transformation jutsu. He could transform into a guard or an inmate who has access to the prison exit areas. Then he could just walk out when the opportunity arises.
In this situation, Naruto could also use his ninja skills in a discreet way. For example, he could use his shadow clone jutsu to gather information without being noticed. He might discover that the ones who framed him are actually part of a larger conspiracy against the Hidden Leaf Village. So, his main goal would then not only be to get out of prison but also to expose this conspiracy.