Overview
The Spanish Cape Mystery is a 1935 American mystery film directed by Lewis D. Collins and starring Donald Cook, Helen Twelvetrees and Berton Churchill. It is based on the novel of the same name featuring the detective Ellery Queen.
Plot
After unmasking a clever jewel thief for the benefit of his police inspector father, Ellery Queen and his friend Judge Macklin leave for what they hope will be a bachelor vacation on the California Coast. Macklin assures Queen that there is only one large mansion in the area where they will be staying. But when they arrive at their cabin, they find heiress Stella Godfrey bound and gagged to a chair.
Stella, while being driven back to her mansion explains that she has been resisting the efforts of all her family members to marry her off to the first available man. Only her uncle David seems to be sympathetic to her views. That night, a gunman abducts the two of them at gunpoint, left them tied in the cabin, and apparently escaped to sea in the family yacht.
When the grounds are searched, the dead body of society sponge John Marco is found on the patio, garroted to death some time ago and wearing only a bathing suit.
From Wikipedia (CC BY-SA 4.0).