This feels like a film noir of a detective (of course) named JohnDaniels? (aka JackDaniels?) who is being haunted by the ghost of his sister-in-law, InaBell?. Actually, Ina might be considered an ex-sister-in-law, since John had divorced her sister, EllaDaniels?.
Although Ina does ask John to pass on a message to her husband, FrankBell?, she displays a surprising amount of selflessness by trying to help improve Johns life. This includes improving his relationship with GingerMaloney?, the widow of John's partner, TomMaloney?.