You would do anything to protect your child. Even if she's a monster?
Rebecca Carter and her daughter Monica, nicknamed Moonflower, travel the American West alone and isolated. Wherever they go, bodies are left behind.
Special Agent Marc Donner of the FBI has been tracking a serial killer for the best part of two years. A murderer who kills only men. All of them with their throats opened, their bodies bled out and their spinal cords severed. The killer leaves no trace, no clues - only a trail of corpses.
After all this time, Donner has gleaned only a handful of facts from the few witnesses and snippets of CCTV footage available. He's hunting a middle-aged woman who drives a van with blacked-out windows and false plates. Often, she poses as a child online to lure in her prey. But it's never been enough to track her down - until now.
And so begins a cat-and-mouse game between Donner and his prey, Rebecca and Moonflower. But who is the actual hunter - and who is the actual prey? Perhaps Moonflower isn't the child that her mother claims she is. Perhaps she's something else - and as Donner puts everything on the line to capture them, perhaps he isn't prepared to face what is really out there...
