Natsuko Saeki, a young woman working for an advertising company in Tokyo, returns to her family's home in the countryside. There she finds her brother, Yasuo, searching for a "phantom" rice seed called tatsunishiki, rumored to create a new form of sake. He finds the seeds, but after he passes away suddenly, Natsuko quits her job and begins working at the sake brewery to realize Yasuo's dream of making the best sake in Japan.