Irene is an ordinary married woman living in Amiens, in the North of France. She works in a bank where, one day, she finds herself duty-bound to strip a client of her credit card and check book for ten years. Later on, while walking in a park Irene notices a mysterious homeless woman wearing a yellow coat. At a time she witnesses her shoplifting in a store. One night, on her way back home, she is attacked by the mysterious woman.