The aftermath of the explosion threatens to end the Sicarius case unless the BAU can justify a reason to keep it open. The hunt takes them to a death row inmate - but is he a killer or another one of Sicarius' victims?
With the fate of the Sicarius investigation hanging in the balance, the BAU takes a case in West Virginia, where an UnSub practices his own twisted form of Old Testament vengeance.
Voit's internal struggles with himself lead him to a desperate kidnapping. But Rossi's obsession brings the BAU closer to the truth than they've ever been.
With Rossi in Voit's clutches, he grapples with the limits of his technical know-how and mental strength. As the BAU tightens their grip on Voit, he reveals just how far he's willing to take his deadly crusade.