Single man David (Mark Ruflo Mark Ruffalo) decides to rent out his apartment in order to forget his grief. Strange things began to happen: a girl named Elizabeth (Reese Witherspoon Reese Witherspoon) broke into David's life and claimed it was her house. Elizabeth seems to have an extraordinary ability, she can appear everywhere at any time, pestering David to force him to move out. However, she did not know that there was a cruel truth behind it-Elizabeth was just a ghost. She was a workaholic and was killed in a car accident. David invited the exorcist, and Elizabeth gradually knew who she was. In this process, there is a love between David and Elizabeth, Elizabeth and David missed the fate, accompanied by this fruitless relationship appears to be saddened.