Twenty years ago, a toddler disappeared, never to be seen again. Matilda Gray is drawn to the case - and discovers her own part in a terrifying, otherworldly secret.
Successful cellist Matilda puts her musical career on hold to investigate the strange link between her mother's death and a young girl’s disappearance.
Matilda has unsettling encounters with the residents of Penllynith and grows increasingly suspicious that Rose is hiding something, while events in Dean House become evermore sinister.
Matilda’s revelation reopens old wounds for the residents of Penllynith, whilst the Dean family’s sinister connections are revealed. Meanwhile Rose is pushed to breaking point, and Meredith considers coming clean.
Matilda starts to piece things together with help from an unexpected source, as Graves investigates the suspicious circumstances surrounding Ewan’s death.
Laura warns Matilda that she is in grave danger, as Graves grows suspicious of Aron and Ed, and Hal vows to get to the bottom of things once and for all.
Matilda ignores Sean’s advice that she should leave Penllynith, choosing instead to protect Davey.