With a trail of murdered women leading up the west coast, Zoe Mack gets an unexpected invitation to work with the Federal Bureau of Investigation. Zoe's arrival to the FBI is less than ideal, however, and she struggles to find her place on the team. Her new partner isn't helping. Jeremiah Johnson makes it clear that he doesn't want or need someone like her - someone with a past tied to their suspect. She has personal knowledge about their killer, and accepts this chance to get her feet inside the door, even if that means working with her ex-partner Elijah Stone. A brutal attack tore them apart, their friendship still strained by pain and anger. Zoe vows to close their case and end the reign of terror that has haunted her, even if that means she loses herself along the way.