In a beautiful village in England, Joan Stanley (Academy Award winner (R) Dame Judi Dench), lives in a satisfied future. Then suddenly his calm was destroyed and his compilation was completely captured by MI5. Because Joan has passed an extraordinary past; he was one of the most proven spies in history .
Cambridge University in the 1930s, and young Joan (Sophie Cookson), a clever physics student, fell in love with an attractive Russian saboteur, Leo. Through him, he began to see that the world was on the edge of a knife and might have to be saved from himself in the race towards military supremacy.