London, 1941 When Mary meets a glamorous stranger named Elizabeth she realises their lives couldn t be more different. Elizbeth is beautiful and charming, about to set off on a dazzling adventure to Ireland where she s inherited a grand house. Mary, shy and meek, has nothing to look forward to but the dreary life of a maid in Hampstead. But when an air raid forces them to take shelter underground Mary s life is suddenly changed forever. After waking up in hospital, injured but alive, the nurse mistakes her for Elizabeth and hands over her suitcase with Elizabeth s money and tickets to Ireland inside. This is Mary s chance to escape the hardship of her life and start afresh.