Book excerpt: After the death of her husband, Rose Trevelyan lives peacefully in Cornwall, working as an artist and photographer. But when she hears terrified screams as she paints the rugged Cornish countryside, and a local woman is reported missing, Rose finds herself suddenly caught at the centre of a police investigation.With so many people who trust her, Rose is - reluctantly, at times - privy to the secrets of many. When the things she is told in confidence appear connected to the investigation, Rose must decide how far the bonds of friendship reach.