In the wake of a sudden tragedy, a London cellist unearths secrets that link her mother to the disappearance of a young girl in a small Welsh town. Tara Fitzgerald, Pippa Haywood, Joanna Scanlan, Claire Rushbrook, Brendan Coyle, Sian Reese-Williams, Joel Fry, Richard Harrington, James Frecheville, Lydia Wilson, Sian Reese Williams Added on Netflix 2018-03-24. Youtube Trailer