When Aislinn Cain and the SCTU shows up, Aislinn realizes that this isn’t a new serial killer. He’s terrorized her hometown before. Her father worked the case the first time with only an exotic bite mark as a clue. Now, Aislinn will start the manhunt of her life as she becomes determined to catch the monster that eluded her father. As she sinks further into the hunt, she'll uncover a horrifying past that proves skeletons should stay locked in closets.
A new killer is using medieval torture methods to slay his victims. She can give them a glimpse into his twisted world, but not without a cost. If she opens herself, she risks falling into the depths of her own darkness. Can she afford to help, knowing that the cost could be her own humanity?
Then a chance encounter; a hand gesture, the laugh, Aislinn Cain knows it’s him. Her old foe has returned to torment her. The rest of the SCTU is worried her brain tumor has returned, because it’s impossible.
As Aislinn falls further down the rabbit hole, chasing phantoms, the team tries to pull it together to find their poisoner. However, Aislinn isn’t the only one chasing phantoms, as belladonna brings back nightmares for another member of the SCTU and will leave them questioning their decision to work with serial killers. Then someone attacks the VCU, further hindering the investigation.
Amid the mass deaths, the SCTU must decide between tacking down the person poisoning bar patrons in South Dakota or getting revenge for their fallen serial killer hunters. Finding this killer will bring more questions than answers, it will open old wounds, and force everyone to rethink what they know about serial killers.