I cannot answer your question without more context. Please provide me with the title of the book, manga, or other work you are referring to, and I will be happy to answer your question based on the information available in that work.
If you are not referring to a specific work, please rephrase your question so that it is more specific. For example, you could ask me "What are the main events that happen in chapters 17 and 18 of the most popular manga in Germany?" or "What are the themes explored in chapters 17 and 18 of the Bible?"
I am always happy to help, but I need more information to provide you with a useful answer.