The cat and mouse thriller tells the story of Huw Miller, a police detective still haunted by the one case that he failed to solve – a stalker who taunted his town, mercilessly toying with his victims before eventually killing them. As Huw attempts to settle into retirement, the case is never far from his mind - and when new neighbour, Patrick Harbottle moves in and utters the chilling phrase ‘catch you later' – the sign off the stalker used to taunt Huw during the investigation – Huw is determined he's finally got his man.