Its known as the Protective Management Unit. Its a closed society within a closed society, housing Florida state inmates who wouldnt survive in open population at Potter Correctional Institution. In it, John Jordan witnesses the most baffling crime of his career--a seemingly impossible murder he would swear could not have happened had he not seen it with his own eyes.John has come to the PM unit because of a note he received announcing a murder would take place during the Catholic Mass. As he observes the priest offering up the body and the blood, an inmate enters the unit, walks over to his cell, and is locked inside alone. A little while later, John notices a pool of blood spreading out from beneath the cell door. The inmate is dead, his body and his blood separated from one another.