Requiem

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 twenty years ago. Matilda and her accompanist Hal travel to Penllynith to investigate whether her mother's suicide could be related to Carys' disappearance.

Matilda has a number of unsettling encounters with the residents of Penllynith and grows increasingly suspicious that Rose is hiding something, while events in Dean House become ever more sinister.

Aron Morgan lodges a formal complaint against Matilda for harassing Davey, and the police are unmoved by Matilda showing them what she believes is a clue to Carys's disappearance. Trudy is wracked by guilt for her part in Carys's disappearance and meets Matilda to ascertain whether or not she's telling the truth. Meanwhile, Rose is pushed to breaking point as old wounds are reopened and her relationship with Aron deteriorates.

Matilda meets Laura, who claims to know crucial details about Carys's disappearance. Meanwhile, Matilda starts suffering from disturbing blackouts, and Sean shows himself once again to offer an explanation for what Matilda is experiencing. Aron struggles to deal with his anger and guilt about what happened to Rose. Nick gets more disappointing financial news about the Dean estate following Meredith's death. Graves notices some suspicious circumstances surrounding the discovery of Ewan's body.

After a new discovery, Kendrick agrees to do everything in his power to reopen the case. Laura tries to warn Matilda that she is in grave and imminent danger, but Matilda is starting to have doubts about who she can trust. Hal's blossoming romance with Trudy allows him to reflect on his relationship with Matilda, and he resolves to get to the bottom of the Penllynith mystery once and for all. Graves becomes increasingly convinced that Ed and Aron are hiding something.

A badly-injured Sean makes it to Dean House to warn Matilda that she is in mortal danger. Matilda becomes increasingly worried about Davey's safety with neither of his parents around to protect him, and Trudy pines after Hal and rues her harsh parting words. Graves grows suspicious of Kendrick and starts to wonder whether Matilda has been telling the truth all along.