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.

Lupe Vélezas Carmelita Lindsay
Leon Errolas Uncle Matt Lindsay / Lord Basil Epping
Charles 'Buddy' Rogersas Dennis Lindsay
Elisabeth Risdonas Aunt Della Lindsay
Donald MacBrideas Percy Fitzbadden
Minna Gombellas Edith Fitzbadden
Don Barclayas Fingers O'Toole
Lillian Randolphas Hyacinth
John McGuireas Luders
Mantan Morelandas Lightnin'