Liverpool, 1978: What starts as a vibrant affair between a legendary femme-fatale, the eccentric Academy Award-winning actress Gloria Grahame, and her young lover, British actor Peter Turner, quickly grows into a deeper relationship, with Turner being the person Gloria turns to for comfort.

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.