They're always watching.
Special Agent Kerri Elias joined the Boundary Enforcement Agency--"The Boundary"--three years ago, trying to escape the ghosts of her past and fight the Black-eyed Children, a mysterious, implacable foe who impersonate young children in order to abduct humans. She's frustrated, though, by a sense that she's spinning her wheels, contributing little toward the mission--until the night her partner is captured before her very eyes.
His disappearance catapults Kerri into a world of shadows, betrayals, and intrigue, where not all of the enemies have the Children's signature obsidian eyes. She's thrown together with three people whose loyalties are uncertain at best--her boss, the blustering Special Agent in Charge Harlan "Duke" Rendell; his tough-as-nails, second-in-command Danielle Tauriac; and newcomer Aaron Vincent, a handsome, young agent just transferred in from the Atlanta field office who may be hiding as much as he's telling.
Through it all, Kerri is forced to contend with the ever-present threat of the Black-eyed Children and a growing sense that she's next on their hit list. Do they know something she doesn't? Or could the handwritten note left for her on a desolate hillside in the New Mexico desert be correct, and she really is the only person on Earth who can save humanity from total annihilation?