Ghost (1990)

While out on the town one evening, New York couple Sam (Patrick Swayze) and Molly (Demi Moore) are confronted by a mugger. After submitting to his demands, Sam is murdered anyway. He then finds himself a disembodied spirit, invisible to the living world, wandering without hope until he finds a spiteful spirit aboard the subway (Vincent Schiavelli) who gives him some helpful pointers on how to co-exist. Soon Sam comes back into contact with those he knew in life, and he begins to learn piece-by-piece of his close friend and co-worker Carl's (Tony Goldwyn) embezzling plot which caused his death; the apparent mugging was, in fact, a premeditated murder. In the meantime, Carl has designs on Molly, and Sam is determined to extract revenge. He contacts a psychic (Whoopi Goldberg), and together, the two set out to serve justice and stop the maniacal Carl from getting to Molly.