Captain Drummond travels to Switzerland in order to marry his girlfriend but the disappearance of a dangerous cargo of explosives makes him delay his plans.

On the eve of his wedding Captain Hugh Drummond is off to Morocco when Scotland Yard's Colonel J.A. Nielson is kidnapped by international criminal Richard Lane. With his fiancée Phyllis Clavering, friend 'Algy' Longworth and his trusty valet 'Tenny' Tennyson, Bulldog flies his own plane 1200 mile...

Bulldog Drummond goes up against foreign agents trying to steal plans for a top-secret aircraft.

As a ploy to gain publicity, a motion picture director wants his star actress to take a baby with her on a train trip. The director's secretary asks the train's engineer, an old boyfriend, for help. As the engineer ponders what to do, a stranger in the train station tells him that he has a baby t...