Forensic psychologist and FBI agent Alexis Forrest's search for the serial killer responsible for her sister's murder has hit a wall. All the evidence she has found has led her to the identities of numerous victims, yet the killer is still unknown.

But he knows who she is, and he is watching her from the shadows. He is hiding in plain sight near Broken Hill, the snowy New England town that Alexis used to call home.

Meanwhile, a young suburban mother goes missing while out on a morning run. When Alexis starts to dig deeper, she finds out that the woman's perfect marriage and family are not what they seem. Secrets and resentments are swirling around the couple. Did someone take her or was it the husband after all?

While Alexis is busy with her new case, the serial killer continues to watch. He is close. Close enough to strike.

Can Alexis find the woman before she's killed? Can she figure out who is stalking her before he makes his move?