Zakes (William Ash (actor)) and his girlfriend Beth (Christine Bottomley) are driving along the rain-drenched M1 motorway at night, stopping at every service station so he can put up posters in the restrooms as part of his job. Tired and irritable, the two bicker continuously about their fragile relationship along the way. Beth is eager to tell Zakes she has recently cheated on him but can't find the right moment.