Shades of Groundhog Day or some more sophisticated what if time travel.
I was surprised at how tight the story is and every minute, every word, and every movement had a part in this story. They actors were well chosen as from the beginning to end you believe their characters are real and that you are taking part in the story.
House wife Linda Hanson (Sandra Bullock) finds out that her husband (Julian McMahon) has died. And wake up the next day to find him there. This is only the beginning. Soon she realized that it is probably a premonition. The story is also filled out with what could have been and what may have been. And what should have been. Sandra puts us all in a different Zeite.