Following the death of her mother, Becky begins the sad task of sorting through her empty flat. Starting with the letters piling up on the doormat, she finds an envelope post-marked from Cornwall. In it is a letter that will change her life forever. A desperate plea from her mother's elderly cousin, Olivia, to help save her beloved home. Becky arrives at Chynalls to find the beautiful old house crumbling into the ground and Olivia stuck in hospital with no hope of being discharged until her home is made habitable.

When Mia inherits her beloved grandmother's summer cottage, Birch Thorpe, in Sweden, she faces a dilemma. Her fiance Charles urges her to sell and buy a swanky London home, but Mia cannot let it go easily. The request to carry out an archaeological dig for more Viking artefacts like the gold ring Mia's grandmother also left her, offers her a reprieve from a decision - and from Charles.   

Cornwall, 1798. Eighteen months have passed since midshipman Edmund Melville was declared missing, presumed dead, and Amelia Carew has fallen in love with a young physician, Luke Bohenna. But, on her birthday, Amelia suddenly receives a letter from Edmund announcing his imminent return. When he returns, it is clear that his time away has changed him. Amelia, however, is determined to nurse him back to health and honour his heroic actions in the navy by renouncing Luke.

2018. When a skeleton is found entangled in the roots of an ancient tree on Rhys Morgan’s country estate, Quinn is persuaded to come out of retirement to film one more episode of the Echoes from the Past series. But the nameless skeleton proves to be the least of her problems when secrets from the past suddenly come to light and a new threat looms over her family.

When molecular biologist Holly Reilly is forced to go on the run carrying a piece of technology with the potential to change what it even means to be human, she calls the only person she trusts with the skills necessary to keep her alive: her estranged husband Gabriel.