For the last seven years, Mary O'Connor has waited for her first love. Every evening she arrives at Ealing Broadway station and stands with a sign which simply says: 'Come Home Jim'. Commuters might pass her by without a second thought, but Mary isn't going anywhere. Until an unexpected call turns her world on its head. It will take the help of a young journalist called Alice, and a journey across the country for Mary to face what happened all those years ago, and to finally answer the question: where on earth is Jim?