No new story arrives in this chapter. It looks at one person who was in that room for a thousand nights. She hardly speaks at all.
In chapter 1 Shahrazad sent for her sister before going to the palace. She asked her to request a story when the night was late. Dunyazad did that, and did it for a thousand nights.
What she says in this book is nearly one line. That line comes round again every night. And without it this book does not begin.