一個頑固至極的退休校長，一隻不請自來的流浪貓…

已經退休的校長先生森衣，因妻子過世了而過著獨居生活，會來拜訪他的只有亡妻生前曾疼愛的流浪花貓「咪咪」，以及負責製作鄉鎮官網資料的區公所員工祥吾。然而有一天，咪咪突然不再出現了。森衣正為這件事掛懷之際，剛好瞧見亡妻生前經常光顧的美容院裡貼了一張「尋貓啟事」，上面名為小玉的貓，居然長得跟咪咪一模一樣，他發現咪咪居然同時以小空、千尋等不同的名字出現在其他鄰居們的日常生活中…

Kyoichi is a former principal. He lives alone now after the death of his wife. When his wife was alive she liked to feed stray cat Mii. Kyoichi though doesn't like Mii coming around his house and standing in front of the butsudan (Buddhist altar).
One day, Mii suddenly stops appearing at Kyoichi's house. Kyoichi begins to worry about Mii and tries to find the cat. While searching for the cat, he discovers that there are other people also looking for Mii.