In a mansion full of secret rooms and passageways, people are dying shortly after seeing the ghost of a woman in gray, as an old legend dictates. Called in to solve the mystery, Sherlock Holmes has doubts about the supernatural aspect of the crimes and focuses on a more earthly culprit.

• Nordisk Films Kompagni
• Viggo Larsen
• Holger-Madsen
• Gustav Lund
• Elith Pio
• Poul Welander