Every day, millions of people travel on London's Underground, yet everyday life is not nearly as mundane as we think. At Notting Hill, the secretary, harbouring her secrets travels to work; at Highbury and Islington, Adam has a sudden change of heart; at Holborn, a disastrous reunion is about to take place. With her characteristic mix of humour and biting realism, Maeve Binchy enters the lives of ordinary people.