As Red sets Liz and the Task Force on the trail of an eco-terrorist with a mysterious connection to Alexander Kirk, Tom takes matters into his own hands.

The Task Force chases an artful bounty hunter employed to target Red's closest associates. Meanwhile, Ressler faces a moral dilemma when he takes on a new assignment with a former colleague.

As Liz works with Red to hunt for Tom's killers, she begins to question his motives. The Task Force enlists the help of one arsonist to catch another.