A new magistrate in the town of Horisoto—widely reputed to be the most lawless township in Japan, uses guile and his opponents' own misperceptions and prejudices to defeat his enemies and uproot corruption.

Botchan (Kazunari Ninomiya) has sense of strong justice and does not lie. He is offered a teaching job at a middle in a small village far away from his hometown of Tokyo. Botchan accepts the position and begins to work as a math teacher. The assistant principle there wields absolute power. Botchan has a hard time dealing with his fellow teachers and the students.