Kutouryuu, a medicine peddler who kept a kakeba-cho (a list of customers for medicine peddlers) with a kutouryuu on the cover, would sometimes take on troublesome cases as "baiyaku" (purchase) as he traveled from country to country. His goal is to discover the secret of his birth. The only clue to the secret of his birth is a metal fronting "Kutouryuu" on a cigarette case. In search of someone who knows "Kutouryuu," Kutouryuu continues his journey...