Howard is a wealthy cat. Under the terms of his late-owner's will, he inherits her mansion, and estate, on condition that he provides a home for nine needy cats. The rescued cats soon move in and make themselves at home.

Unfortunately, they are haunted by a mysterious 'Phantom Cat.' Legend states that when the Phantom Cat is sighted, a tragedy will take place. One-by-one, the cats disappear, kidnapped by the fearsome Phantom Cat of Howard House.