When 17-year-old Lily Harper moves to a crumbling brownstone in the heart of New York City with her family, she hopes for a fresh start after her parents' messy divorce. But the house has a dark past, and it doesn't take long for Lily to realize that they're not alone. Whispers echo through the halls, shadows stretch where they shouldn't, and something unseen seems to follow her every step. As the ghost's grip tightens, Lily discovers that its intentions are far from innocent-and escaping may cost her more than her sanity.