I've hunted sexual predators, serial offenders, and brought down a cult. This time I might be in over my head.

A serial killer who knows no boundaries, not in his depravity, or geographically. Four victims. Three cities. Different countries. And that's just the beginning, or is it?

What starts as a serial murder investigation soon takes a far more sinister turn. An unspeakable crime is being covered up, and it's up to us to find the truth. The only way to do it – my way. Equal parts profiler and vigilante, but I no longer hunt alone. Aidan's in this fight with me, as my husband and boss.

With countless lives at stake, nothing will stop us from protecting the innocent. Even if the killer lives in the public eye. No one is untouchable...