Carmelita and Uncle Matt find themselves in a haunted house, but the "ghosts" are actually enemy agents who are trying to frighten away visitors in order to develop a nitroglycerin bomb.
Carmelita Lindsay
Uncle Matt Lindsay / Lord Basil Epping
Dennis Lindsay
Aunt Della Lindsay
Percy Fitzbadden
Edith Fitzbadden
Fingers O'Toole
Hyacinth
Luders
Lightnin'