This is a story about "forgetting" and "truth", "madness" and "reason". The former martial arts legend and the unparalleled "Sword Master" was seriously injured in a peak battle and lost his mind. He became a confused "madman" holding a rusty iron bar and was forgotten by the world in a border town.
Until the alien cavalry slaughtered the town, in a desperate situation, he used the rusty iron bar to show a terrifying power that transcended the scope of martial arts and was almost "Tao" - not relying on internal strength and moves, but an intuitive killing that pointed directly at the "principle of existence" and "point of rupture" of all things. Overnight, he got a new name: "Rust". Watch how a forgotten madman uses a rusty iron bar to redefine the "rules" of the world and inquire into the deepest "truth" of the world.
