Lauren Kline is pretty, young, medicine resident, who is completely devoted to her work in the Emergency Room of San Francisco Memorial Hospital. She works round the clock dealing with patients. Until she has an accident and goes into a coma. While she is in a coma, she appears (like a ghost) to Arthur, the man renting her old apartment. Only he can see or hear her. After some initial disbelief on his part, they fall in love.
It is also about the importance of the human soul. In a certain point of his life, Arthur thought his soul was lost. In the minute that he is able to feel love again, he also finds the power to face his past.