By day, Eli Mercer is a respected therapist—charming, calm, and in control. But beneath his polished exterior lies a darker truth: he has a code, and he kills those who deserve it. Abusers. Manipulators. Monsters hiding in plain sight.

When a mysterious new client, Lena Cross, enters his life, everything begins to unravel. She's a puzzle he can't solve—and she's hiding secrets of her own. Then a series of brutal murders start cropping up in the city—victims Eli was already watching. But he didn't kill them.

Someone knows what he is. Someone's taunting him. And they're getting closer.

As Eli hunts the hunter, the lines between justice and obsession blur. Because in this game of shadows, only one predator can survive.