During the summer vacation period, temporary teacher Honoka Kimijima is in charge of a supplementary class. One day, a female student suddenly jumps off from the school rooftop and dies in front of Honoka Kimijima. Then she notices a mystery student who is not supposed to be there.
Musashi returns Japan's legendary swordsman and philosopher to the screen once again. In an original period drama based on the historical facts of the life and travels of the famous Miyamoto Musashi we find an apprentice, an instructor and the account of a famous battle in Japan of the Middle Ages where many questions will be answered.
When he was young, Hasegawa Hirakawa was taken care of by the daughter of an izakaya, who wanted to become a secret agent. Although Hirakawa gave up this wish, Asami began to explore independently for the thief, Kogawara, the murderer, and the net cutter, who Hirakawa was looking for. Although he successfully entered the group of the uncle of the murderer, he fell into a desperate crisis.
