...is a nine-year-old nuisance named Sigmund Heidsick III, more commonly known as ""Siggy."" Siggy is a most imaginative child, an expert in the fine art of ""whopper"" telling. No wonder no one believes his latest-that he witnessed the attempted assassination of the President of France and can identify the killers. Sister Piper and latest love Tom Plummer certainly don't. They're much too involved in trying to get together without Siggy wriggling in between. Neither does his grandfather, the Colonel who is trying to maneuver Piper away from her spindly French fiance who is keeping a baleful eye on Tom. Poor Siggy... followed...almost run over...persecuted by the man with the white face and red hair. But vindication comes with a bang when the assassins lay siege to the Colonel's lovely country house... There are some nice humorous touches along with all the action. It's solid if superficial entertainment.