Mae Nak Phra Khanong
According to tradition, the events occurred during the reign of King Mongkut. The story is about a beautiful young woman named Nak, who lived by Phra Khanong canal in Bangkok, and her undying love for her husband, Mak.
With Nak pregnant, Mak is conscripted and sent to war (in some versions of the story the war is against the Shan tribe, while others are not specific), where he is seriously wounded. While he is being nursed back to health in Bangkok, Nak and their child both die during a difficult childbirth. When Mak returns home, however, he finds his loving wife and child waiting for him. Neighbors who try to warn him that he is living with a ghost are all killed..........
Full story: http://en.wikipedia.org/wiki/Mae_Nak_Phra_Khanong