A young girl (Briony) is secretly in love with an older man (Robbie) who is interested in her older sister (Cecilia). A story of young love and jealousy, which drives Briony to point Robbie to a crime he didn't commit. Briony then went on to spend the rest of her life to atone that blunder.
Simple theme, simple story line, but Ian McEwan is very successful at tying all the events and lives together to deliver a happy ending... in the mind of Briony, all of which finds fulfillment in the pages of Briony's book of the same title.
Well-scripted (as the novel itself was well-written) and well-directed, the movie is a must-see. You'll probably be amazed by the postal service that has remained efficient even at the height of World War II. I was! :-D