Detective Hugh "Bulldog" Drummond is called on to investigate the activities of his arch enemy Carl Peterson (James Villiers). Carl tries to stop the British from testing a new and improved fighter plane. Drummond travels to Morocco to check into rumors of attempted tampering and espionage by Carl and his henchmen. Comedy relief is provided by Robert Morley as the cooking instructor Miss Mary. Sydne Rome play the delectable double agent whom Drummond is attracted to but whom he also suspects is up to no good. Carl gathers together a bunch of mini-skirted gun-toting mod girls to do his evil bidding in this lightweight spy saga.