Meredith is a continuity girl. Her job is to make sure that the details in every scene on a film shoot are consistent. She is the error catcher. The needle- n-the-haystack finder. A cigarette in the left hand when it should be in the right, a prematurely melted ice cube in a half-empty glass of Scotch, a stray lock of an actor’s hair—these are the details by which she measures out her life.