When Douglas Westray, the son of an eminent aircraft manufacturer, is found shot dead in a locked room at a society ball, it seems obvious that it's suicide—after all, he had two failed engagements behind him, and had lost the family firm a prestigious prize through his own neglect. But not everybody is convinced—including Freddy Pilkington-Soames, who soon discovers that there are still questions to be answered. Why was Douglas wearing the wrong shoes when he was found? What is the connection with a near-disaster at an air show? And was Freddy's narrow escape from death under the wheels of a car an accident or something more sinister? Assisted by his old friend, the wayward and irrepressible Lady Gertie McAloon, and pestered at every turn by rival reporter Corky Beckwith, Freddy finds himself drawn into a world of sabotage, blackmail and shady deals which threaten to scupper the success of a new fighter plane before it even gets off the ground. But there's more at stake than just money, and now it's up to Freddy to untangle the clues and unravel the dark secret of a murderer who has already killed at least once and will think nothing of killing again.