Chen Yan, a modern Chinese medicine physiotherapist, travels across the eight continents with his grandfather's ebony massage mallet and evening primrose petals, and encounters Elf Maple, whose spiritual veins have been exhausted. He opened "Yuxinan", which combined techniques with Sansho leaves, vines and other herbal medicines to heal the samurai's energy veins and soothe the spirit veins of elves. He fought against the Royal Pharmacy's abuse of black root grass and used massage to connect humans and monsters, composing a Japanese fantasy chapter of healing and togetherness.
