If life is about the journey and not the destination, then the passengers on the 4:23 train from London Kings Cross to Edinburgh Waverley dont know which way to go. Everyone has somewhere to be: a weary office-worker, a struggling actor, a teenager who wont tell anyone where hes going or why. As the train moves north, a cast of colourful characters open up and discover that they have more in common than they might think. With unexpected delays, irritating announcements and embarrassing moments, this new musical is about the extraordinary lives of ordinary people.