Townsfolk walking by the abandoned Parnell mansion tend to quicken their steps -- especially if night is begining to fall. But to tommy and his friends,Books and Harry the blimp, the old house is the perfect playground for their imaginary games. Then one night the three friend overhear a strangers plan to destroy the house in order to find it's hidden treasure. There must be away to save Parnell house -- but what can three kids do? Luckily, they have help. Two parnells stills live there -- two Parnells who happen to be ghosts!