Rudolf, a stray black cat, finds himself unexpectedly parted from his cherished owner. He awakens to discover he’s been transported to the bustling city of Tokyo in a long-haul truck. In this unfamiliar urban landscape, he encounters Ippai-attena, a formidable feline leader who commands respect and fear throughout the city. With no way to return to his previous life, Rudolf begins to adapt to his new existence as a stray alongside Ippai-attena. However, he soon learns that Ippai-attena has more to him than meets the eye.