《幸福的麵包》原班製作治癒力作，身兼導演和編劇的三島有紀子與男主角大泉洋再次攜手打造的北海道企畫第二彈，帶領觀眾來到美酒的故鄉空知一嚐芳醇的葡萄酒。東京音樂夢碎的青，回到故鄉與弟弟綠一起打理父親留下的小麥田和葡萄園。青親手栽種有著「黑色鑽石」之稱的黑皮諾葡萄Pinot Noir，可是釀製出來的酒一直不成氣候，但原來只要把感覺再放久一點，痛苦的淚水、喜悅的淚水終會化為幸福的珍釀。創作女歌手安藤裕子飾演闖入葡萄園的旅人，大泉洋和染谷將太兩兄弟與形形色色的客人互相交流，空知的葡萄酒越來越好喝，配上北海道的四季美景，描繪出充滿溫情暖意的人生風景。

The second of Mishima Yukiko’s planned trilogy of Hokkaido-set films, A Drop of Grapevine reunites the director with Bread of Happiness lead Oizumi Yo for another quiet small-town tale about the bittersweet pursuit of life, food and peace with oneself. Forced to give up his music career, Ao (Oizumi) returns to his hometown of Sorachi to run a vineyard on his late father’s farm, the home he once abandoned to chase his dreams. While Ao devotes his energy into making the perfect Pinot Noir, his younger brother Roku (Sometani Shota) grows wheat for bread. The two live in calm if strained life together until one day, a woman (singer Ando Yuko) shows up on the farm and starts digging a hole. Her arrival ferments changes in the lives and relationships of the brothers and the townsfolk.