FBI Agent Ella Dark, 29, is given her big chance to achieve her life's dream: to join the Behavioral Crimes Unit. Ella's hidden obsession of gaining an encyclopedic knowledge of serial killers has led to her being singled out for her brilliant mind, and invited to join the big leagues. But this time Ella finds herself in a cat and mouse chase with no way out, and she must wonder if she is hunting, or the one who is hunted...