Everyone knows seventeen-year-old Grace Foley is a bit mad. She's a prankster and a risk-taker, and she's not afraid of anything-except losing. As part of the long-running feud between two local schools in Swanston, Grace accepts a challenge to walk the pipe. That night she experiences something she can't explain.

The funny girl isn't laughing anymore. She's haunted by voices and visions - but nobody believes a girl who cries wolf.

As she's drawn deeper into a twenty-year-old mystery surrounding missing girl Hannah Holt, the thin veil between this world and the next begins to slip. She can no longer tell what's real or imagined - all she knows is the ghosts of Swanston, including that of her own mother, are restless. It seems one of them has granted her an extraordinary gift at a terrible price.

Everything about her is changing - her body, her thoughts, even her actions seem to belong to a stranger. Grace is losing herself, and her friends don't understand. Is she moving closer to the truth? Or is she heading for madness?