影片讲述了退休校长大吉爷爷在老伴先一步离开人世后，和猫咪小玉一人一猫相依为命的老年生活。

獻給所有愛貓人的暖心物語。退休校長大吉爺爺和貓咪小玉一人一貓相依為命，一天，在這個只有貓與老人的小島，突然出現了一位東京來的神秘女子，在女子鼓勵之下，大吉爺爺開始完成一頁一頁的食譜。

人氣圖文作家貓蒔療癒系漫畫作品《爺爺與小玉喵》改編，獻給所有愛貓人的暖心物語。《岩合光昭的貓部走世界》知名動物攝影師岩合光昭執導。 「小玉啊……你會陪我到最後吧？」 退休校長大吉爺爺在老伴先一步離開人世後，和貓咪小玉一人一貓相依為命，天氣冷的時候就一起窩在暖爐旁取暖、吃飯時間一起開心吃著生魚片，只要有小玉在，就一點也不會感到寂寞。一天，在這個只有貓與老人的小島，突然出現了一位東京來的神秘女子（柴崎幸 飾），她開了島上最「潮」，也是唯一的一間咖啡廳。島上的老人們爭相前來嚐鮮，時尚的老闆娘也意外地好相處。大吉爺爺偶然獲贈鄰居給的一大把豌豆，因為思念起老伴作的豌豆炊飯，在小玉喵的幫(搗)助(蛋)之下，大吉靠著老伴親筆寫的一本食譜完成了這道料理，大吉一邊吃著美食，一邊感慨這份食譜只寫了幾頁。「既然爺爺手藝這麼好，何不由爺爺來完成這本食譜呢？」在咖啡廳女主人的鼓勵之下，大吉爺爺開始一頁一頁地親筆填滿這本食譜。可是，身體向來硬朗的爺爺卻不敵病魔來襲，突然倒下了…… 本片改編自日本暢銷圖文作家貓蒔的漫畫作品《爺爺與小玉喵》，貓蒔擅長描繪線條簡單卻可愛圓滾的萌貓，大受好評。講述一人一貓的老年生活，深深打中貓奴讀者，更獲選為第19屆日本文化廳媒體藝術祭審查委員會推薦作品。這是以《岩合光昭的貓步走世界》聞名全球的動物攝影師岩合光昭首度執導的劇情長片，從頭到尾，保證每一個鏡頭都有貓咪出現！

Daikichi is a 70-year-old man and lives on a small island. Since his wife died, he has lived with his cat Tama. Daikichi was born and raised on the small island and enjoys relaxing days with his childhood friends including Iwao and his cat Tama. Daikichi has a son Tsuyoshi who lives in Tokyo. Tsuyoshi worries a bit about his father living alone on the island, but Daikichi is content with his life. After his close friend passes away, Daikichi worries about his physical condition. His daily life begins to change. Based on manga series "Neko to Jiichan"

2年前に妻を亡くした70歳の大吉(立川志の輔)は、友人たちに囲まれ、飼い猫のタマの散歩と妻が残したレシピノートの作成が日課の自由気ままな生活を楽しんでいた。だが、親しい友人が亡くなり、自身の体にも変調を覚えた矢先、タマがどこかに行ってしまう。

할머니, 할아버지, 그리고 고양이의 섬에서 6살 고양이 타마와 단둘이 사는 다이키치 할아버지(타테카와 시노스케). 어느 날, 죽은 아내가 남긴 미완성 레시피 노트를 발견한다. 이웃들과 함께 이 섬의 하나뿐인 카페 주인 ‘미치코’(시바사키 코우)에게 새로운 음식을 배우며 자신만의 레시피로 비어있는 페이지를 채워나가는데… 한 사람과 한 마리가 선택한 행복, 언제까지나 함께할 수 있을까?