Sam is dragged kicking and screaming into the one case he is certain will be his worst nightmare, as he is recruited to prove once and for all whether Beauregard is real, or a figment of his mother-in-law's imagination. The old ghost claims to know that his own descendants are in danger, but he doesn't know who they are or how to find them, so Sam is forced to delve into history to try to track them down.
The things he learns, however, make the mystery get even deeper, and leave Kim wondering about her own sanity! It all comes down to a race against time against forces that almost seem to be supernatural...