Still reeling from the death of her fiancé, FBI neuroscientist Sayer Altair wants nothing more than to focus on her research into the brains of serial killers. But when the Washington, D.C. police stumble upon a gruesome murder scene involving a girl who was slowly starved to death while held captive in a cage, Sayer is called in to lead the investigation. When the victim is identified as the daughter of a high-profile senator, Sayer is thrust into the spotlight. As public pressure mounts, she discovers that another girl has been taken and is teetering on the brink of death. Sayer soon realizes that they are hunting a killer with a dangerous obsession...a killer who is closer than she thought.