Young Haru rescues a cat from being run over, but soon learns it's no ordinary feline; it happens to be the Prince of the Cats.
Mei is eating a caramel on one very windy day, when suddenly a whirlwind appears and starts chasing her. The whirlwind turns out to be a baby cat bus. Mei offers the kitten a caramel and the two become friends. That night, the baby cat bus visits Mei. Letting Mei ride inside him, he leaps out into the sky. They head for the midnight forest full of ghosts. Other cat buses large and small have also gathered together.
The film is about Koro the puppy, who runs away from his mistress, experiences some adventures around town and who is finally happily returned home.
