One of my favourite movie

Atonement
2007

Out of jealousy, a 13 year old girl irrevocably ruins her older-sister and the latter's lover's happiness when she accuses her older sister's lover of a crime he did not commit. Follow her through a tale of redemption where she tries to depict a happy ending for the ill-fated lovers in her tell-all novel in an attempt to seek forgiveness...

Atonement is a movie directed by Joe Wright and starring Keira Knightley, whom style I absolutely adore, and James McAvoy. The story is adapted from a novel of the same name by Ian McEwan.

Its a romantic drama taking place during World War II and the story is very sad. It is really not recommended for fans of happy ending. However, if you enjoy a realistic and heart wrenching story from time to time, I highly recommend this movie. Prepare your kleenex!!!