Rat, a member of the Chinese Zodiac, encounters an ordinary cat in a park and forms a deep attachment to this individual. This affection compels Rat to champion the cat's inclusion into the Zodiac circle. Assuming the role of advocate and guide, Rat personally escorts the cat to meet each of the other twelve Zodiac members, actively persuading the group to accept the newcomer. Rat's actions are driven by a desire to integrate the cat into the established group, regardless of its non-traditional status.