It doesn't always pay to return to the golden places of our childhood. At eight years-old, Michael Western was sent to stay on Anglesey while his parents worked out their acrimonious divorce. During that brief holiday, he fell under the spell of 9-year-old Olwen, the favourite child of the little town where she lived. For Michael this was a period when he felt safe and valued. Now, 25 years later, he returns to Anglesey with his wife and quaint daughter Tottie to find Olwen, feeling that a meeting with her will bless Tottie's childhood just as his own was blessed.

On arriving on Anglesey, Michael makes a shocking discovery and realises that none of the adults he knew as a child can be trusted. He has a mystery to solve.