In 1994, a toddler disappeared from a small Welsh village, never to be seen again. 23 years later, in London, the mother of rising cello star Matilda Gray commits suicide, without apparent reason. Among her possessions, Matilda discovers tantalising evidence, linking her mother to the Welsh girl's disappearance all those years ago. And so grief stricken Matilda travels to Wales, determined to find out who she really is, even if it means unraveling her own identity. In the process, she uncovers long buried secrets in this remote community - including one secret more bizarre, terrifying and dangerous than anything she could have imagined: Dark otherworldly forces are gathering - they have been waiting many years for Matilda to return. If every life is a story, then for most of us, it's our parents who write the opening chapters. They record and remember our early childhoods as we cannot, acting as trusted witnesses to our lives. But what if you discovered that your parent had lied to ...

It starts on a brutal murder before rewinding back 15 days to find out why and how, and most importantly who was responsible.