Matilda Gray is a successful cellist about to embark on a concert tour of New York, but her world is turned upside when her mother inexplicably commits suicide. Grief stricken, Matilda finds a box of items on her deceased mother’s bed relating to Carys Howell, a young girl who went missing from a small Welsh village over 20 years ago. Matilda and her accompanist Hal travel to Penllynith to investigate whether her mother’s death is related to the disappearance.