How can you face your future when your past it a lie? When Rosie Kenning's mother, Trudie, dies from Huntingdon's disease, her whole world falls apart. Not only does Rosie desperately miss her mum, but now she has to face the fact that she could have inherited the fatal illness herself. Until she discovers that Trudie wasn't her biological mother at all ... Rosie is stunned. Can this be true? Is she grieving for a mother who wasn't even hers to lose? And if Trudie wasn't her mother, whois? But as Rosie delves into her past to discover who she really is, she is faced with a heart-breaking dilemma - to continue living a lie, or to reveal a truth that will shatter the lives of everyone around her...