Former detective Huw settles into retirement alongside his wife Alice, but never far from his mind is the case he failed to solve - that of the Ripton Stalker. When new neighbour Patrick moves in and uses the phrase that the stalker used to taunt Huw with in letters, he's determined he's finally got his man.

Huw is adamant that he heard Patrick admit to being the Ripton Stalker, but Patrick bluffs, later boasting to Steve about Huw's drunken antics. Jenny and Martin find Ruth dead, and Patrick charms his way into chatting with Alice and Margot. Huw finds an ally in Paul, who also doesn't buy Patrick's act, and shows him the case files on the flash drive.