I know everything about you. And you know everything about me... except WHO I AM.

Andi met Camilla at university. Instantly best friends, they shared everything together… until their long-planned graduation celebration ended in tragedy. Years later, Andi is living a seemingly perfect life on the rugged Cornish coast with her loving husband, happy children and dream home. Yet, Andi is haunted by a secret she thought only she knew. Someone out there is bringing Andi's deepest fears to life. And she knows there's no escaping the past...

You trusted me with your secrets, you told me everything, you thought I was your best friend... but you have no idea WHO I AM.

Gripping, unputdownable and packed with twists and turns from the first sentence to the very last, this stunning psychological thriller will make you question whether we can ever really trust the ones we love.