One for the Road follows Jimmy, Paul, Richard and Mark who meet on a rehabilitation course for drink drivers. Jimmy is young, ambitious and desperate to sell his late father's business; Paul has been salesman of the year three times running, however, that was five years ago; Richard is a retired millionaire property developer and Mark is a taxi driver with a weakness for weed and philosophy.
Richard, bored of his mundane existence as a cycle courier, attempts to make his film "A Distance Too Far" in a bid to escape to a better life. Driven by the belief that it will propel him, his friends and his girlfriend to fame and fortune, and the fear of ending up like his family, the completion of his 'masterpiece' becomes the sole focus of Richard's life.