They say never try to con a con man, but there are several people messing with the legend of Ocean Born Mary in Henniker, New Hampshire. Sam Miller and Martha Sanborn are at it again when Martha's brother and his buddy come to town and buy the old Ocean Born Mary house, with hopes of reviving the legend. The appearance of a woman claiming to be a direct descendent of Mary adds a twist to the story, which leads to murder. Sam and Martha make a desperate search for the killer, but the only witness may be a ghost.