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Based on "Avatar: The Last Airbender."
Book Three. As usual, people were wandering around, but in the dream, it was mostly Aang and Katara; Sokka was only present briefly at the very beginning, but I don't even remember what he was doing. There was no one else; they were dressed as they were in books 1 and 2. By this time, Aang had gotten rid of his flying apparatus and now needed a new one. And right there at the market, some fans of the Air Nomads and Aang in particular had made all sorts of kites. There were all sorts of shapes and colors. For example, Aang initially took a kind of "butterfly," meaning the kite didn't have a tail; he just held it with his arms outstretched, and it was yellow (later, Aang switched to a more classic kite with a long pole). Katara also took a kite; apparently, at that moment, my subconscious remembered the episode about the Northern Air Temple and decided that Katara was generally used to flying on such things.
I don't remember the transition to the next part of the dream. There was a large building, probably some kind of concert hall. And hamsters were crawling out of every crack, like in Rimple and Kitz's signatures ("Avatar" isn't over yet!). Aang somehow ended up inside, and there, these hamsters formed a collective consciousness, like they sometimes imagine with insects, and in the form of a huge, complex organism, they knocked him out, burying him under stones, and took the rest of the people captive. My brain switches to Katara: I'm kind of guiding her thoughts, even if I'm not identifying with her, like in a computer game with advanced control features. She is outside and sees that something is wrong with the building; hamsters are crawling out of it. She goes inside, and there's some bald, short, slightly chubby guy, like a caretaker. And she starts explaining to him that you have rodents, and so on, and that she urgently needs to get into the hall (the one where Aang is, to help him). He doesn't believe her, he resists, but she starts paying attention to the sound, the rustling, that these are rodents and you have a problem, and you need to hurry, and so on. At the same time, her patience is running out, and she's thinking, "Okay, now I'm going to torture you with blood magic, you're really annoying!" Finally, he asks, "What rodents?" Well, if she says hamsters, he won't believe her, and even if he does, he won't take it seriously. And he had a little zoo there, three animals: I don't know who, a fox, and a fat hare. Katara immediately decided to lie: "Rats! Like this!" -- she points to the hare. "Even bigger!" The lie worked, but what happened next, I don't know; I woke up. Well, I think the main characters defeated everyone, it was all leading up to that. Did the hamsters set up a second Ba Sing Se with an occupation of the city?