Atonement' 10th anniversary: The inside story on that iconic green dress The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Keira Knightley's "Absolute Nonsense" Netflix Mystery Thriller With a 27% RT Score, Dominates Streaming UK. Keira Knightley and James McAvoy in the (C)Universal Pictures film: Atonement (2007). Plot: Thirteen year old fledgling writer Briony Tallis irrevocably changes the course of several lives when she accuses her older sister's