Lucy Tumbledown is a tip-top cat burglar with an infamous, unrivalled reputation for daring purloinment and high-calibre deviousness amongst connoisseurs of the nocturnally clandestine.

When an underworld whisper circulates that celebrated couturier Belinda Night’s collection of costume jewellery could well be even more valuable than the real thing, liberating the choicest of these fancy-fake sparklers from Mouldsmoth Hall quite naturally presents Lucy with an irresistible compulsion.

But rumours also surface of odd goings-on at Mouldsmoth Hall ~ peculiar sounds emanating from the apple cellar and unearthly light-shows at the oddest of hours. And what exactly happened to reasonably competent safe-cracker Jubilant Perkins when he retuned empty-handed and empty-headed from a bungled excursion there last Autumn?

Selecting her finest set of skeleton keys and sturdiest creep-shoes, Lucy Tumbledown tip-toes across the roof-tops and into an adventure that will immeasurably catapult both her ingenuity and known acceptance of dimensional stabilities...