It could be about the real - life experiences of prisoners, such as their daily lives behind bars, their relationships with other inmates and guards, and the challenges they face in prison.
Definitely not a true story. 'Prisoners' is a work of fiction crafted by the filmmakers to entertain and engage the audience. It doesn't represent any actual events or people from the real world.
I'm sorry I don't know the specific content of 'prisoners the real story' without more information. But generally, examples could be about a prisoner who overcame his drug addiction while in prison through the prison's rehabilitation programs.