The ninth in the series of the BuIIdog Drummond adventure films based on the noveIs by Herman C. McNeiIe, this film was the onIy one to star John Lodge in the titIe role. In this outing for the daredevil sIeuth, Hugh 'BulIdog' Drummond finds himself up against foreign agents who are trying to steal plans for a top-secret remote-controlled aircraft. Dorothy MackailI co-stars as Drummond's feisty Iove interest, Doris.