影片是一部尖锐的反体制喜剧，聚焦北爱尔兰说唱组合Kneecap。以Mo Chara、Móglaí Bap和DJ Próvaí组成的真实说唱组合Kneecap为主角，他们以爱尔兰盖尔语的说唱闻名，其国家主义作品常涉及北爱尔兰问题。2019年，他们因为在一家英国威廉王子及凯特王妃早先去过的酒吧里大喊“把英国人赶出去（Get the Brits out now）”而被谴责。
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