From her first day as Personal Assistant to the celebrated Mina Appleton, Christine Butcher understands what is expected of her. Absolute loyalty. Absolute discretion. For 20 years, Christine has been a most devoted servant, a silent witness to everything in Mina's life. Christine has been there, invisible-watching, listening, absorbing all the secrets. Keeping them safe. Christine is trusted. But those years of loyalty and discretion come with a high price. And eventually Christina will pay.