The Door with Seven Locks is a 1940 British 'Edgar Wallace' horror drama mystery film. It features Leslie Banks, Lilli Palmer, Romilly Lunge, Gina Malo, and J.H. Roberts.
A wealthy lord dies and is entombed with a valuable deposit of jewels. Seven keys are required to unlock the tomb and get hold of the treasure. A series of mysterious events causes the keys to be scattered, and when trying to unravel the circumstances, the heiress of the fortune and her companion investigators become entangled in a web of fraud, deceit, torture, and murder.