When the Grim Reaper comes for Libitina at birth, her high-pitched wail causes it unspeakable pain, forcing it to let her go. Refusing to leave empty-handed, the soul-taker takes her mother instead. Intrigued by her unique ability, it follows her home. What it soon discovers is that there is more to this little girl's power than cheating death—for the more it stalks and questions her purpose, the more dangerous and secretive she becomes.