Beth Monroe dreams of surviving summer baseball without becoming her brother Shane's endless punchline, trapped between his relentless teasing and the urge to vanish into her room. Then Halley arrives in Barryville like a specter—a stranger with no past, no last name, no history anyone can uncover. When this enigmatic girl whispers that beauty matters above all else, Beth transforms herself completely, chasing an image she never knew she wanted. But transformation comes with a price. Beth watches in horror as she evolves into someone unrecognizable, while Halley sinks her hooks into Ryan—Beth's closest friend, possibly her soulmate, if only Beth had noticed him sooner. When Halley's dark secrets begin surfacing, Beth uncovers a terrifying truth: this mysterious newcomer harbors a sinister nature far more dangerous than anyone imagined. Now Beth must race against time to shield Ryan from Halley's twisted reality before the girl's monstrous identity consumes them all.