How well do you know the one you love? Golden Globe®-winning actress Ruth Wilson stars in this powerful three-part drama inspired by the memoir of her grandmother about her family's history.Set in London in the 1940s and 1960s, and in India in the 1930s, the series follows Alison Wilson, who thinks she is happily married until her husband, Alec, dies and a woman turns up on the doorstep claiming that she is the real Mrs Wilson. Alison is determined to prove the validity of her own marriage - and Alec's love for her - but is instead led into a world of disturbing secrets.