Rose and Joshua first met when Joshua and his dad came to live with Rose and her mum.
Then their world turns upside down when their mother and father go out for dinner one evening and never return.
With police inquiries going nowhere, Rose is dispatched to live with her chilly, unfriendly grandmother and Joshua is sent to live with his uncle.
Then Joshua comes to London to study and Rose is witness to not one, but two murders.
Why is this happening to Rose? Can it be anything to do with the investigations Joshua has been doing into the disappearance of their parents?
A taut and pacy thriller that is the start of a stylish new series from an acclaimed writer for teens.