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The penultimate entry in Paramount's "Bulldog Drummond" series, Bulldog Drummond's Secret Police once more stars John Howard as the private-detective hero, Heather Angel as Bulldog's eternal fiancee Phyllis Clavering, and H. B. Warner as the good gray Inspector Neilsen of the Yard. This one finds Bulldog and Phyllis ready to be married in an ancient castle, when a murder occurs, and Bulldog decides to investigate. He eventually uncovers both an eons-old treasure and a highly unsavory character who wishes to claim it for himself.