We all need to know where we come from, where we belong. But for David and Nathalie, this need to know is more urgent than for some people, because they are adopted. Brought up by the same parents but born to different mothers, they have grown up, fiercely loyal to each other as brother and sister. In their late thirties they decide to embark on a journey to find their birth mothers, a journey which turns out to be no straightforward matter. Exploring her subject with inimitable imagination and humanity, Joanna Trollope once again works her magic, exposing the extraordinary challenges that arise at the heart of ordinary lives.