'Atonement', Ian McEwan's acclaimed novel, is a story of doomed love set against the backdrop of the Second World War. Now directed by Joe Wright, and with a screenplay by Christopher Hampton, it comes to the big screen with Keira Knightley and James McAvoy as lovers Cecilia and Robbie, whose love is shattered by the overly fertile imagination of Cecilia's younger sister, played by the Irish actress Saoirse Ronan. Beginning in England on the hottest day of the summer of 1935, an unfortunate misunderstanding sets the tragic ball rolling.