Inheriting unexpected millions has left reporter Jim Qwilleran looking like the cat who swallowed the canary. While his two Siamese cats, Koko and Yum Yum, adjust to being fat cats in an enormous mansion, Qwilleran samples the life-styles of the rich and famous by hiring a staff of eccentric servants. A missing housemaid and a shocking murder soon show Qwilleran the unsavoury side of the upper crust. But its Koko's purr-fect propensity for clues amid the caviar and champagne that gives Qwilleran pause to evaluate the most unlikely suspects...