Atonement

In England in 1935, precocious 13-year-old Briony Tallis (Saoirse Ronan) lives on her family's country estate with her mother and sister, Cecilia (Keira Knightley). Cecilia is home for the summer from Cambrige where she had been studying with the housekeeper's son, Robbie (James McAvoy). She and Robbie have an uncertain relationship; neither is willing to act on it but a certain romantic chemistry exists between them. One day, Briony sees from her bedroom window an argument between Cecilia and Robbie at the fountain. Robbie accidentally broke an antique vase and a piece of it fell into the fountain. Angrily, Cecilia stripped to her underwear and dove into the fountain to retrieve it. Briony is confused about the sexual tension between the two of them...