"Tao of the Mad Sage: A Legend of Blood and Ash" is an Eastern philosophical fantasy blending epic mythology with dark comedy. It follows Lin Shu, a mentally unstable monk whose power stems from his madness, wielding a wooden broom that conceals a celestial demonic seal. In a world ruled by rigid Taoist sects, Lin Shu becomes a threat simply by defying the established laws of ascending the "Seven Heavenly Realms."