A Hitchcockian premise - it's Strangers on a Train squared as there are four of them. The year is 1973. Four people are thrown together in a railway compartment of an early morning mail train from London to Sunderland. To pass the time they share a little about themselves and the purpose of their journey. Claire is working in electronics and believes a desk-sized personal computer will make her fortune. Tony is an actor heading home for a job in touring school's theatre company. Edward is a top lawyer and adviser to the Heath government on the new venture into the European Union. The insignificant little man in the corner, John, says, 'Actually I'm a murderer.' No one really believes him, but in the days to come one of his fellow passengers will become his latest victim...