Maybe it's about Harry being wrongly accused and his fight to prove his innocence while in jail. He could be making friends with some unlikely characters in the jail who help him in his quest.
Perhaps the story is set in a magical or alternate universe where the laws are different. Harry is in jail for breaking a law that he didn't fully understand. The fanfic could then show his journey of learning about this new world's legal system while trying to get out of jail.
In a 'Harry Potter goes to jail' fanfiction, perhaps Harry breaks a new law that the Ministry of Magic has created to maintain control. For example, if he tries to teach magic to non - magic people in an attempt to prepare them for a potential dark wizard threat. The Ministry, fearing chaos, throws him in jail. Inside, he meets other wrongly - imprisoned wizards and they plan an escape together while also fighting against the unjust system.
Another character could be a fellow inmate who has been in jail for a long time. He befriends Harry and teaches him the ropes of surviving in jail.
One possible plot could be that evidence of their abuse towards Harry finally surfaces. Maybe a wizarding neighbor who has been secretly observing them reports their cruel treatment of Harry to the wizarding authorities. Then they are arrested and sent to a wizarding jail, where they struggle to adapt to the magical world's justice system.
Perhaps Percy is in jail as a sacrifice for someone he loves. In the fanfiction, he might be accepting his situation at first, but then his friends outside start to plan a rescue mission. It could show his loyalty and their determination to get him out.
One possible plot could be that Edward is wrongly accused and is in jail. His friends outside start an investigation to prove his innocence. They might face many obstacles like uncooperative witnesses or a corrupt system.
Another plot could involve Reid going undercover in jail for a case. He might have to endure the hardships of prison life while secretly gathering information. He could make unlikely allies among the inmates who help him in his mission. This would show his adaptability and his ability to gain people's trust even in such a tough environment.
It could be that Batman breaks one of his own moral codes in a desperate situation. For example, he might accidentally cause the death of a criminal while trying to stop a major crime. This action, which goes against his no - killing rule, makes the public and the law turn against him, sending him to jail. In jail, he has to face his own inner demons and also deal with the threats from other inmates who see him as a big target.
Maybe Naruto breaks out of a prison in a hidden village where he was wrongly imprisoned. He then has to evade capture while trying to prove his innocence.
Well, perhaps Naruto accidentally breaks a really important and ancient law in the ninja world. It could be something related to a forbidden jutsu that he was unknowingly involved in. As a result, he's thrown into jail. There, he might start to reflect on his actions and ninja way, and also try to find a way to prove his innocence while making some unexpected allies among the prisoners.
The plot might involve Anakin's struggle with his feelings in this so - called 'love jail'. Padmé could be the catalyst for his change. She might encourage him to embrace their love more openly, which leads to him changing his attitude towards the Jedi Order and his place in it. It could also explore how this change affects their relationship, like whether they face more difficulties or become closer as a result.