As her stepbrother, Joshua, continues to decipher the meaning of the cryptic murder notebooks, Rose wonders if the recent death of her former best friend may hold a clue to the disappearance of Rose's mother and Joshua's father.
Five years after seventeen-year-old Rose's mother and Joshua's father disappeared, when the step-siblings reconnect in London, Rose witnesses two murders which she fears are linked to coded notebooks Joshua has found and his investigation of the disappearance.
