England, early 18th century. The close relationship between Queen Anne and Sarah Churchill is threatened by the arrival of Sarah's cousin, Abigail Hill, resulting in a bitter rivalry between the two cousins to be the Queen's favourite.
A businessman on his daily commute home gets unwittingly caught up in a criminal conspiracy that threatens not only his life but the lives of those around him.
Based on the real life story of legendary cryptanalyst Alan Turing, the film portrays the nail-biting race against time by Turing and his brilliant team of code-breakers at Britain's top-secret Government Code and Cypher School at Bletchley Park, during the darkest days of World War II.