After renovations from the gas explosion, Oz re-opens for visitors, which are escorted to the prison by Father Mukada. Reverend Cloutier survived the gas explosion that actually freed him from the wall he'd been sealed behind. Arif tires to blame O'Reily for O'Keenan's death.
The inmates deal with the crash of the bus that killed their loved ones who were on their way to see them. Alvarez wants Chico to stab him, but not kill him. Unfortunately, Chico does try to kill him. Bob begins to do research on herbal remedies to cure his grandson's leukemia. The death of Hank Schillinger brings the FBI into the prison. Suzanne Fitzgerald decides to teach music in Oz.
As new developments arise in the Cloutier mystery and Keller retherns, Morales and Redding call an uneasy truce to work together.
While Howell and Nathan have an much-needed, in-depth conversation and Alvarez and Hill train seeing-eye dogs, Schillinger's beef with Said takes a murderous turn.
As O'Reilly attempts to manage Cyril's legal fees and Robson makes trouble, Schillinger's friendly behavior towards Beecher proves to be a cover for more nefarious motives.
As Keller and Beecher raise McClain's ire and Said and White's relationship develops, Cyril faces the start of his trial.
As Beecher tries helping Guenzel, Meehan comes up with an idea that could help Cyril. Meanwhile, Morales and Redding bicker following Hill's recovery.
As Urbano and Morales come to an understanding and Cyril is subjected to media attention, Beecher clears the air regarding Schillinger.