Disney's low point.
When reading about the making of this film, the creators talk happily about how each character was conceived, and their personality carefully developed.
When WATCHING the film, it's evident that PLOT development took a back seat. There's next to no story here. But lots of well-developed, unnecessary characters.
In brief: an evil butler hears that his employer is going to leave her fortune to her cats. In hopes that he will be the new beneficiary, he dumps the cats in the countryside.
The cats then wander around meeting various characters.
After which they return home for revenge on the butler.
The plot is even more underdeveloped than in the Jungle Book, without that film's saving grace of excellent music. The 'Everybody Wants to Be a Cat' song is probably the film's one saving grace.
Don't buy it--rent. Better yet, get it from your library.