However, based on the title, it sounds like the story might revolve around a machine that rejuvenates people, making them younger. If this is the case, the important events in each city they visit would likely revolve around:
* The machine's arrival: The machine's arrival would likely be a big event, drawing crowds and generating excitement and curiosity. People would be eager to test its effects and see if it truly works.
* The machine's impact: The machine's use in each city would probably have significant consequences, both positive and negative.
* Positive: People might feel younger and more vibrant, leading to a renewed sense of energy and optimism.
* Negative: The machine could lead to ethical dilemmas, such as who gets to use it, whether it's fair to those who cannot, and potential consequences of sudden age reversal.
* The machine's departure: The story could end with the machine leaving each city, leaving the inhabitants to deal with the changes it brought about. This might involve the lasting effects of rejuvenation, the ethical and societal repercussions, and the unanswered questions surrounding the machine's origins and purpose.
Without more information about the story, it's impossible to give more specific details.
If you can provide more context, such as the author, genre, or any specific details about the machine and the cities, I can help you with a more accurate and detailed analysis.