Durham, North Carolina, 2012. When Detective Sofia Rodriguez is called in on her day off to find a plumber dead in his van—posed with Black-Eyed Susans and a Sylvia Plath verse cradled in his bloodied hands—she knows this is no ordinary murder. By the time the second body surfaces, then a third, Sofia and her partner Detective Jones are hunting a serial killer with a message, a method, and a symbol none of them can identify. That symbol belongs to The Protectorate—a century-old secret society of elite women that has quietly shaped American history from the shadows. When their emblem appears at a crime scene, the organization's leadership launches its own parallel investigation, desperate to contain the exposure before the FBI closes in.