With Joey Matthews still missing and the search for Joe Carroll escalating, the FBI brings in Nick Donovan to run lead on the case, much to Ryan and Parker's dismay. Meanwhile, a follower from the past meets up with Joe Carroll, and their plans have a life-threatening result.

With Weston still in the hospital, Ryan and Parker attempt to outsmart their new leader Nick as a way to continue their search. In a surprising move, Joe reaches out to Ryan to demand Claire's location and reveals that he will go to great lengths to lure her out of FBI custody. Meanwhile, followers from the past make a shocking return.

After discovering Claire's location, Joe sends two followers to capture her, but Ryan may be one step ahead. Meanwhile, Jacob struggles with recent decisions causing his reunion with Emma to be less than ideal. Also, a relationship from Ryan's past plays a significant role in his future.

After losing Claire to Joe's followers, Ryan and Parker attempt to recover while the FBI tracks down an undercover location that may have dark ties to Joe's following. Meanwhile, Claire adjusts to life at the follower's mansion and has an unexpected reunion, while Emma and Jacob continue to deal with Emma's betrayal.

Ryan and the FBI discover a follower who might be able to lead them to Joe Carroll's location. Agent Weston returns to the case but his run-in with the cult may have had a bigger impact on him than anyone originally thought. Meanwhile, Claire and Emma come face-to-face for the first time since Joey's kidnapping.

The Havenport Police Department is brought onto the case and Roderick's role as sheriff is called into question, which leads him to make a shocking decision that threatens the safety of Joey. Meanwhile, Ryan goes against the FBI, hoping to gain the trust of one of Joe's followers.