Chicago detective Mason Danvers seeks justice when his pregnant wife is brutally murdered by a criminal he had previously put behind bars. Driven by vengeance, Mason orchestrates his own imprisonment to face off against the same perpetrator, Victor Abbot, who is serving time in Stonewall Penitentiary. Inside the prison, Mason discovers the corrupted environment ruled by its ruthless warden and the power held by Abbot's dangerous gang. He is determined to dismantle the crime ring from within and bring those responsible to justice, even if it means blurring the lines between right and wrong.

As Mason battles his way through the violent and treacherous world of Stonewall, he allies himself with several inmates while facing brutal opposition from others. He must navigate the deadly politics of prison life, where every step could lead to betrayal or death. With his resolve unshaken and his mission clear, Mason's quest for retribution puts him on a relentless path of violence, moral dilemmas, and a final confrontation that will test the limits of his endurance and morality.