Sunny is a naïve circus performer who dreams of inheriting his father's knife-throwing skills. However, his hostile colleagues continue to bully him, relegating him to a lowly clown. On a tour to Malaysia, Cheung and other performers discover a cave occupied by the Japanese army during World War II. Instead of finding treasure, the performers - including Sunny - are sprayed with a mysterious chemical that turns them into superhuman mutants...
City Under Siege is a 2010 Hong Kong science fiction action film directed, produced, co-edited and co-written by Benny Chan. The film stars Aaron Kwok, Betty Shu, Jacky Wu, Zhang Jingchu, and Collin Chou. The film follows a group of circus performers who goes on a rampage after an accidental exposure to chemical gas left by the Japanese army in World War II, granting them superhuman abilities.
