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Watch City Under Siege online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

Sunny (Aaron Kwok), an ordinary clown in a local circus, by chance is turned to a mutant with extraordinary power in an accident. He decides to declare a battle for goodwill of the City with a troupe of circus performers who embark on a crime spree after they acquire superhuman skill in the same accident.