Samurai Kook and his senior brother Zhan Hu practice the breathing sword technique together, and embark on the road of killing ghosts in order to kill the "big Prajna" that harms the human world. In order to avenge his senior brother's killing of a tiger, Samurai Kook practiced the "Breath of the Sun" and finally killed the giant ghost "Daizhi Hannya" who was causing harm to the world with his sword "Daizukiri".