A young woman's (played by Gwyneth Paltrow in her best British character role to date) life is impacted by the few seconds that occur between her missing her routine morning train and her making it. The film shows us the two sides of her life as they alternately exist, the woman who misses the train and the woman who makes it. One goes back home to find that her live-in boyfriend is having an affair and this changes her life, while the one who makes the train goes to work as usual and does not find out about the affair. Note to first time watchers: don't get too attached to either woman too much because as you may know about cases of Doppelgangers, they don't end well.
Review of Sliding Doors
