On a trip to a retired police captain's country home, the boys and their friends find him missing and themselves plagued with mysteriously threatening happenings that seem related to an old local legend.
While in the air, Nancy sees a car go off the road, and reports it. Everyone says the road is not been used since the bridge went down. Searching for that special car leads her to a young mechanic, but as they open the barn-doors?
Nancy's aunts are going to sell their property. The day before the deal is reality, a burglar steals all documents. Nancy goes to her aunts to explain. One aunt shows very discomfort, and speaks about voices in the walls??
The boys discover that the missing person investigation they are working on for their dad is linked to his job providing concert security for a rock star Tony Eagle (played by Ricky Nelson)--and that the missing person is linked to a plot to murder Tony.
Nancy revives a play in a theater that is supposed to be haunted. Actors from the original cast return to do the play. They seem to have intentions rather than the play, which makes Nancy suspicious and determined to discover the secret of the phantom.
Frank thinks he sees a girl whom he knew years ago who went missing, whose parents hired his father to locate but couldn't. When he tries to talk to her she claims that she is someone else. So he and Joe try to follow her but someone tries to kill them so they think she's mixed up in something.
Under a Charity Fair, the landowner claim it has been a jewelery theft from their safe. A young Mexican is accused, after been seen on the property. Nancy believes the case has more sides to it than it seems. Who and how?
While scuba diving, Joe and Frank are surprised by a boat that dumps a large package overboard. Taking it home, they discover that it contains a jade figurine which may or may not be very valuable. The boys decide to investigate the origin of the "Jade Kwan Yin" which soon puts them in conflict with an Asian gang of thugs.
At a party after a winning football game, the star feel discomfort. After party is over, Georgie forget her purse and goes back for it. Through the window she see a body on the floor. Nancy and police come along and see nothing. Foul play??