In December 1926 mystery writer Agatha Christie went missing. Her stylish roadster was found abandoned at a quarry pit in the South of England, and after an exhaustive police search for her failed, her estranged husband was suspected of murder. Eleven days later she surfaced "sick and bewildered" at a posh resort 200 miles away in Yorkshire. Deluged with the press, she refused to talk about the disappearance that had captured worldwide headlines...