Elizabeth Masterson (Reese Witherspoon), a young doctor whose work is her whole life, had a serious automobile accident while on her way to a blind date. Three months later, David Abbott (Mark Ruffalo), a landscape architect recovering from the death of his wife, moves into the apartment that had been Elizabeth’s.

Elizabeth appears to David at the apartment. Though seemingly a normal person, she has ghostly properties and abilities: she can suddenly appear and disappear, move through walls, and once takes over his actions. When they meet, they are both surprised, as Elizabeth is not aware yet of her condition.

For the most part, David is the only one who can see Elizabeth, leading others to believe that he is hallucinating and talking to himself. It is later revealed that one of Elizabeth’s young nieces can also sense her presence although she cannot see her.

At first, Elizabeth does not remember anything of her life, and refuses to believe that she is dead. Her memories come back gradually. Together, assisted by Zen-like psychic Darryl (Jon Heder), she and David find out who she is, what happened to her, and why they are connected.

Eventually, David discovers that the reason he is the only one who can see Elizabeth is that he was her blind date. They find that her body is in a coma in the hospital. In accordance with her living will, she will soon be taken off life support. Elizabeth’s spirit and David, who have fallen in love, manage to prevent this just in time, and she miraculously recovers. However, she doesn’t remember anything that happened during the coma or any of the events with David, which leaves him heartbroken.

One day, Elizabeth goes up to her roof and sees David, who got in with the spare key and is finishing up the garden there. Just as he is about to leave, she asks for her key back. When their hands touch, her memory is restored, and they kiss. Before the credits roll, Darryl is shown looking at them in a crystal ball. Darryl is proud and sighs “Righteous”.

(sumber : Wikipedia)