What's that noise? Jackie and Dick and Sam are too scared to move. Why should there be a noise like that in a deserted house? The Ghostly Trio has come to explore, but this is too shivery! 
 
Jackie is eleven. Her neighbors, Dick and Sam, are brothers. The three form a secret club for exploring deserted houses.  That's all the old house on the Pine Knoll is supposed to be.
 
But before the Ghostly Trio is done, they uncover a mystery, they find the important clue, and they expose a strange forgery.
 
Best of all, they're able to help their new friends, the Mason family, out of real trouble.