When notorious serial killer Joe Carroll escapes from death row and embarks on a new killing spree, the FBI calls former agent Ryan Hardy to consult on the case. Having since withdrawn from the public eye, Hardy was responsible for Carroll's capture nine years ago. Hardy knows him better than anyone ; he is perhaps Carroll's only psychological and intellectual match. But the Ryan Hardy who broke the Carroll case years ago isn't the same man today. Wounded both physically and mentally by his previous pursuit of this serial killer, Hardy isn't calling the shots on this case. He works closely with an FBI team, which considers Hardy to be more of a liability than an asset.
In an attempt to learn new information, Ryan and Max capture a suspect. But complications lead to a game of dangerous cat and mouse. Also, Joe grows accustomed to his surroundings and establishes a plan of his own, while Emma realizes she is in dangerous company.
After the latest shocking revelation in the case, Ryan and Max attempt to put the pieces together and stay two-steps ahead of the FBI, despite Weston's constant warnings to stay out of the way. Meanwhile, Emma becomes even closer to Mark and Luke, while Joe and Mandy meet up with a follower in search of assistance.
The FBI becomes more aware of Ryan's undercover agenda as he searches for a link between the tragedies in New York and the remaining members of the Havenport cult; a shocking event leads to Joe starting a new plan.
Ryan receives mysterious phone calls that lead to an encounter with a major threat; revelations about Joe's new life come to light.
Despite appearances a healed Ryan Hardy has gotten his life together, he continues to obsess about Joe Carroll; a murderous rampage on the anniversary of Joe's death leaves everyone determined to uncover the truth.