With their latest target on the run, Ryan and Mike follow a tip to a small town to investigate and confirm he isn't seeking protection. While in town, they both discover an even larger threat who has managed to avoid suspicion up until now. Meanwhile, Max struggles to make a confession.

With only a few days before Joe Carroll's execution, Ryan and Mike shift their focus to a new threat. Meanwhile, after being approved to start work again, Max rejoins the task force and comes dangerously close to a deadly menace.

The FBI closes in on a suspect whom they believe to be the culprit behind the latest murders, but Ryan believes the killer is still out there, leading him to dig deeper into dangerous territory. Meanwhile, Joe undergoes evaluation in the days leading up to his execution and a new threat tries to cover his tracks.