The Door with Seven Locks 1940

A wealthy lord dies and is entombed with a precious trove of jewels, guarded by seven keys that are needed to unlock the tomb. The mystery unfolds as a chain of strange events scatters those keys, pulling in the rightful heiress June Lansdowne and a pair of investigators who must untangle a growing web of fraud, deceit, torture, and murder. As the case tightens, the formidable Dr. Manetta [Leslie Banks] becomes the obvious suspect, and he is said to be aided by a mute family butler and a runaway chauffeur who are drawn into a perilous plot to seize the treasure. Inspector Cornelius ‘Andy’ Sneed [Richard Bird] joins the pursuit, weighing every clue as tension mounts and the truth starts to come into focus.

When June arrives to claim her inheritance, she is seized and imprisoned inside the tomb before she can reveal her presence. A startling turn of luck comes when a clever pet monkey intervenes, stealing the key that unlocks the tomb’s secret, and the heiress is ultimately freed from her confinement. The mystery deepens as Dr. Manetta proclaims an unsettling admiration for Torquemada—the infamous chief torturer of the Spanish Inquisition—and reveals a basement museum filled with torture instruments, a chilling symbol of the danger that surrounds the treasure and the people involved.

As authorities close in, Manetta is cornered in an automatic spiked mummy case, a tense moment that culminates in a reluctant police rescue. He offers a full confession, then takes poison, proudly claiming he killed himself with a goblet once owned by Lucretia Borgia. The resolution comes with a final reversal: the treasure is found inside the tomb—the very place Manetta avoided searching to keep Lansdowne’s captivity out of the spotlight. The discovery ties together the scattered clues, exposing the motives and revealing who was really willing to risk everything for the jewel-filled fortune.