When radicals from Japan's Red Army took a woman hostage in the resort town of Karuizawa, Nagano in 1972, Officer Atsuyuki Sassa was put in charge of diffusing the situation. But the task had its challenges. Upon arriving in mountainous Nagano, Sassa had to compete with freezing winter temperatures, conflicting opinions between the Tokyo Metropolitan Police and the Nagano Prefectural Police, as well as public opinion to gain entrance to the lodge that held the single woman captive.

Set during the Meiji Restoration period of Edo era Japan, Naoyuki belongs to the 8th generation of the Inoyama family, a wealthy family known for finance & accounting. He is also a gifted mathematician and uses the abacus with extreme skills. Naoyuki works under the declining Kaga domain. Because of this, Naoyuki and his wife Koma suffer hardships as their stature and wealth dissipates.

Husband and wife Michiko and Takao move from their urban existence in Tokyo to the isolated, rural farming village where Takao grew up.