Miss Seeton has a secret mission: to foil a jewel heist at Buckingham Palace.

Who should be hobnobbing with the great and the good at a Buckingham Palace garden party but little Miss Emily Seeton, retired teacher and artistic sleuth. It seems there may be a traitor amongst HM’s faithful retainers.

But while Miss Seeton is viewing shrunken heads and other royal treasures with Sir Wormelow Tump, a plan is being hatched by a titled crook to steal valuables of a different kind – a fabulous set of Lalique jewellery. So the battling brolly must make the most of her royal appointment and literally ‘use her head’ to save the day.

Serene amidst every kind of skulduggery, this eccentric English spinster steps in where Scotland Yard stumbles, armed with nothing more than her sketchpad and umbrella!