1. Episode 1

When Colin Howell and Hazel Buchanan meet at their local Baptist Church in rural Northern Ireland, they start an affair which will have cataclysmic consequences.

2. Episode 2

Colin and Hazel carry out his plan to kill Lesley and Trevor, and stage it to look like a suicide pact. But will the community and the police believe their story?

3. Episode 3

As the inquest approaches, Colin and Hazel have to hold their nerve. But even if they do get away with it, can their relationship survive?