Now that is a different story which is why I said "most" Big Fish Games. If this is a full adventure game which has not been dumbed down like they do some of them, there very well may be a saved game location.
A lot of games get put into the hidden files, but since this is a Big Fish game, they might have changed how it saves. I would suggest contacting Big Fish and see if they can help her.
I checked and the original game saved in whatever path to the game is and then Saves. She might check in the hidden files... C:/Users/hername/AppData and check in one of the 4 files located there. I'd start with Local first. It may be under Big Fish or Sherlock Holmes.
Heading out to the gardens...