This BBC drama is centred on Alison Wilson, a woman who lives happily with her husband and their two sons... until her husband dies and a man comes to the door stating that he is the son of Mr Wilson's wife... who he never divorced despite what he told Alison. Alison is determined to discover the truth and as she investigates she learns more of her late husband's secrets. Intertwined with her investigations we see flashbacks of how she met during the war when both worked for the Intelligence Services... something that explains many of his lies.
This is one of those dramas that would seem somewhat far-fetched if it wasn't based on real events. That reality is emphasised by the fact that the actress portraying Alison Wilson is none other than her actual granddaughter Ruth Wilson. She does a really good job in the role and is ably supported by a quality cast that includes Keeley Hawes, Iain Glen, Fiona Shaw and Ian McElhinney. The story is populated with interesting characters and provides some impressive twists and surprises. Overall I'd definitely recommend this drama; the story may be personal in nature but it feels like a mystery or spy thriller at times.
