The team investigates a network killer who buries his victims alive, and Tara confronts Rebecca's ex who has recently re-entered her life. Ronald Graber delivers a message from his Disciple to Voit.

Network UnSubs torture and kill hostages as Voit works with the BAU to stop them. Rebecca's ex, Evan Delray, is appointed Voit's new liaison.

When the team works to hunt down the person who shot Tara, they discover "The Disciple" deliberately had them chasing their tails. While undergoing critical surgery, Tara gets to the root of her relationship issues.

After Voit and Ochoa are kidnapped by "The Disciple", the team races to find them. While in The Disciple's custody, Voit wrestles with keeping the monster inside him at bay.