Japan in the 17th century was in the heyday of the Tokugawa shogunate. At that time, he was in power for the fourth generation of generals (dye valley will be acted the role of). Born in a go family, Yasuzhe Anjing (Okada Junichi) not only has superb chess skills, but also keen on arithmetic and astronomy. On the recommendation of Masaji Seike (Koshiro Matsumoto), the head of the Huizu clan, he and a group of professionals embarked on a painstaking and long journey of astrological observation. The observation results show that there has been a lot of deviation in the Xuanming calendar, which was introduced into Japan from the Tang Dynasty and has been used for 800 years. Represented by the high-weight martial arts nobles such as Hiroshi Mito (Guichi Nakai), I hope to take this opportunity to formulate an accurate and practical local calendar. However, the work is not only difficult, but also under pressure from the royal family in Kyoto. After more than ten years of game, Zhe had the most ups and downs and brilliant life. This film is based on Chong Fangding's novel of the same name.