A black-and-gray tabby kitten loses its mother and gets lost, unable to find its way home. Exhausted and on the verge of collapse, it encounters a young boy who has fallen down. From then on, the boy's family temporarily takes care of the kitten. Since the boy’s family lives in an apartment that prohibits pets, they must go to great lengths to ensure their neighbors don’t discover the cat. However, as time passes, they grow increasingly attached to the kitten while continuously failing to locate its original owner. After experiencing a series of events, the family eventually moves to a new apartment, beginning a fresh chapter of life with the little cat.