One morning, the King of Wisperia mysteriously vanished from his bedroom… only to reappear as a pure white cat! However, in the Kingdom of Wisperia, cats are feared as terrifying monsters. As panic spreads throughout the castle, the loyal Captain of the Royal Guard, Sage, desperately searches for a way to deal with this unknown creature. Left with no other choice, he turns to the one person who might understand—a mysterious witch.