A police diver is involved in an explosion on a routine search of London City Airport Docks. He survives but is badly burnt. because of circumstances he is under suspicion of being involved. The pressure builds and he finally snaps when he finds out his wife has been having a long term affair. He ends up in a hospital for the insane and is chucked out the police force, and the enquiry is nicely closed much to the delight of his senior officers who saw Mac as a thorn in their side. Mac decides to start a new life and see more of the UK and get away from the horrible events that ruined his career and marriage. He buys the largest motor caravan he can afford and heads south towards his routes in Devon. Away from London and seeing life in a new light, the events of the last few months are not what they first seemed. Now for his own sanity and peace of mind he still wants to know the truth.