The daily lives of prisoners in Emerald City, an experimental unit of the Oswald Maximum Security Prison where ingroups - Muslims, Latinos, Italians, Aryans - stick close to their mutual friends and terrorize their mutual enemies.
On the surface, not much has changed inside the walls of Oswald State Penitentiary. Schillinger has revenge on his mind, Cyril is facing execution, Beecher is hoping for parole, and McManus is finding solace in a meditative maze. But there's toil and trouble brewing in the Oz cauldron, as the Oz players rehearse for their presentation of Macbeth and the climactic final act.