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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.

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?

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?

The past catches up with Colin as he is finally driven to confess his crime. But when Hazel pleads not guilty, will Colin take all the blame?