After a mysterious encounter in her childhood, Sakura Mamiya gained the power to see ghosts. Now a teenager, she just wishes the ghosts would leave her alone! Then one day she meets Rinne Rokudo, a boy who is far more than what he seems.

Rinne's cat Rokumon and the rest of the shinigami Black Cats by Contract have been summoned to a mysterious gathering. While their owners puzzle over their disappearance, the cats themselves have no idea what the purpose of the meeting is... Is a feline uprising on the horizon?