Dolwen. A majestic house standing in a lush, green valley. After Mair’s death her children and their families return home during the summer holidays to scatter her ashes and to discuss the future of Dolwen. There are family secrets. Old quarrels. Old emotional and psychological scars. A family’s story as they come together under the same roof for 35 days at the height of summer. There is tension and bitterness between Dolwen’s dark walls, and before long there will be a murder …
The Dolwen Farm siblings return to scatter their mother's ashes: Geraint with partner Gwenda and his daughter; Sara with her family; Nia on her own and troubled Ifan.
Family members continue to squabble over the contents of the will, while Ifan searches for his mother's diaries mentioned in it. Catrin and Josh become closer.
Huw accuses Tom of swindling money from Lissie. Dafydd takes action after Huw once again refuses that Sara rent the farm. Nia demands Tom repay his debt to her.
Nia continues to drink heavily, Dylan demands a divorce. Lissie finds Mair's rings in Tom's room. Joy goes into labor but Ifan is missing after meeting Huw.
The siblings are having a debate. Tom demands his father ignore Mair's wishes about the land. Joy begins to doubt Ifan's version of the events which lead to Gwyndaf's death.
Tom threatens Catrin and Josh. Ifan agrees to accept the land if it's divided between the siblings. Gwenda is injured in the cellar. Tension grows between Dafydd and Nia.
Mabli mentions Heulyn's upcoming birthday. Lissie continues to meet Tom. Ifan signs the papers. Josh overhears a revealing conversation between Joy and Huw.
Tensions erupt in the final two days of the 35 leading to Ifan's murder.