The leading character who sells stones in a riverside reads a book, "The complete collection of haiku of Seigetsu, a wandering haiku poet," which he was forcibly lent by YAMAI (a pun on a word of Yamai which means disease), the owner of a secondhand bookstore, who pretends to be a sick person, walks unsteadily and idles away his time.
河原で石を売る主人公が、病人のふりをしながらよたよた歩く無為徒食の古書店主人山井（病をもじったもの）からむりやり貸し付けられた『漂泊俳人井月全集』を読む。