Sliding Doors

Helen Quilley gets fired from her public relations job. As she leaves the office building, she drops an earring in the lift, and a man picks it up for her. She rushes for her train on the London Underground but misses it as the train doors are closed; but the film then rewinds, and the scene is replayed, except that now she manages to board the train. The film continues, alternating between the two storylines in which different events ensue (but with occasional intersections of the two).