Biographical story, based on life of Ino Tadataka, a Japanese measurer and cartographer. Ino Tadataka travelled the length and breadth of Japan on foot for 17 years from the age of 55 to perform his surveys. The accuracy of his maps also owed much to the fact that he was the first surveyor in Japan to combine measurements on the ground with observations of the heavens. Ino started the work as a private individual but earned the confidence of the Shogunate and it eventually turned into a national project. His maps were later used for many years as the foundation for maps made by modern survey techniques.

Kyoko is a university librarian and she also helps her parents with their drycleaning company. She is involved with a childhood friend from the neighborhood, Kota. He is the son of the local tofu maker and has begun a moderately successful career as a stand-up comedian. A visiting lecturer from Tokyo falls head-over-heels in love with Kyoko and asks her to go abroad with him to Beijing, where he has to spend the next few years for his research. But Kyoko cannot decide.