Accompanied by her neurotic grandson Doughy (pronounced Dough-ee), she is invited by her friend, Lady Dunholm, to investigate the suspected poisoning of her husband.
When a fresh attempt is made on Lord Dunholm's life that results in his death, Granny Gosling is ecstatic. For it is now a murder case. Her very first.
Armed with her leather valise containing the written exploits of the leading fictional crime solvers of the day as well as the most advanced technological detecting equipment "that the celebrated detectives down at the Yard are as yet wholly unaware of," Granny Gosling vows to get her man.