...can't believe this hasn't been played, but I couldn't find it when I searched so maybe I'm OK. 
And in other trivia - on my first trip to NYC (Easter 1991), I got to see the cobblestone street in Greenwich Village where Sam Wheat was killed...got my picture taken lying there and everything.
From Wiki:Sam Wheat (Patrick Swayze) and Molly Jensen (Demi Moore) are a happy and loving couple living in New York City. The only problem in their relationship is Sam's apparent discomfort with saying "I love you" to his girlfriend, only responding to her saying it with "ditto". This bothers Molly, who feels she needs to hear him say "I love you" in return.
One night, while walking back to their new apartment after going to the theatre, they encounter a thief named Willy Lopez (Rick Aviles). He pulls a gun and Sam is shot. Sam chases Willy, but loses him; when he returns to Molly, he sees her cradling his own corpse, and realizes that he is now a ghost, trapped between worlds. Lights descend to take him away, but he flees.
Sam realizes that the robbery was planned when Willy sneaks into the house and rifles through his belongings. Sam follows Willy home and learns that his close friend and co-worker, Carl Bruner (Tony Goldwyn), hired Willy to rob Sam in order to get his office computer password; Carl is involved in a money laundering deal at the bank where he and Sam worked. Sam had recently changed his computer password, locking Carl out of the phony accounts where Carl had stashed the money. Sam lashes out in frustration at his supposed best friend, but realizes that, as a ghost, he can do little.