England, 1930s. Christopher Banks has become the country's most celebrated detective, his cases the talk of London society. Yet one unsolved crime has always haunted him; the mysterious disappearance of his parents, in Old Shanghai, when he was a small boy.

Moving between London and Shanghai of the inter-war years, When We Were Orphans is a story of memory, intrigue and the need to return; of a childhood vision of the world surviving deep into adulthood, indelibly shaping and distorting a person's life.