The humans are gone. No one knows exactly how long ago they left, or why. But in their absence, cats evolved — physically, socially, and mystically — into the dominant species on earth. They built cities from the ruins of human civilization. They forged weapons, governments, and alliances. They discovered Meowgic: a mystical force gifted to them by Mommy Nurtur, the source of their fabled nine lives.

And out in the Miasma-choked wastelands beyond the city walls? Rats, toads, and frogs — twisted by the same corrupting force that drove the humans away — wait for their moment.