In the heart of Kyoto, a mysterious murder shakes the tranquility of the city. Conan Edogawa, the young detective, and his friends arrive in the ancient city to participate in a martial arts tournament. However, their journey soon turns into a thrilling investigation when a famous kendo master is found dead. The crime scene is not only filled with confusing clues but also has a connection to an ancient artifact that harbors a dark secret.
As Conan delves deeper into the master's life, he faces a web of rivalries and hidden passions that could cost him his life. With the help of the intrepid Ran and the insightful detective Kogoro, they begin to uncover the complexities of the case, which involves a group of kendo students and an old rival who has more to reveal than just his swordsmanship. Conan must piece together all the puzzle pieces before the killer strikes again.
As he digs into the history of the martial art and the destinies of the suspects intertwine, Conan realizes that the legends of the past can be as dangerous as modern crimes. With a sharp wit and his unwavering sense of justice, he must solve the mystery while simultaneously protecting his friends from a lurking threat in the shadows. Tension mounts at every corner as Conan faces an enemy who challenges not only his mind but also his ability to stay alive.