While discussing a sensitive investigation on "A", the Fourth Raikage and his subordinates were attacked by a cloaked stranger. Surprisingly, it turned out to be Naruto Uzumaki himself. Though he denied allegations of attempted assassination, Naruto was found guilty of other crimes. To avoid tension, Tsunade locked Naruto up in Houzuki Castle, a prison for ninja criminals. Naruto attempted to escape even with his chakra sealed by the warden, Mui. He discovered that the prison held secrets he never imagined, and with the help of two inmates, he embarked on a dangerous mission to clear his name and earn his freedom.