Jim Qwilleran packs up the cats and moves into a mansion in town for the winter. While Koko and Yum Yum play, Qwill turns his attention to two suspicious deaths: the mansion's former owner and a local farmer. The case is going nowhere until Koko unearths surprising evidence that someone is willing to kill to supress.
In this charming Cat Who mystery, a misused mansion sets the stage for a strange caper for Jim Qwilleran and his cats Koko and Yum Yum.

Qwill's moved into the old Gage mansion--and the cats are on a treasure hunt. The house's fifty closets are crammed with several generations of junk, and while Qwill investigates two recent deaths--those of the mansion's former occupant and a local potato farmer--Koko investigates the contents of the closets. Qwill and the cats wind up unearthing some surprising skeletons--and bringing long-buried secrets to light...