City Under Siege (film)

City Under Siege simplified Chinese traditional Chinese is a 2010 Hong Kong science fiction action film directed and cowritten by Benny Chan. 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.

Many years ago,somewhere in Malaysia,when the Japanese are experimenting on some gases that mutates people when their lab explodes,killing all inside.One day, Sunny overhears a plan the rest of the troupe a making to explore a cave, rumored to be filled with gold. Instead of killing Sunny, they use him as the point man for their expedition. They find crates filled with capsules and force Sunny to open them. Inside the first are numerous plates of gold. They then try to kill Sunny, and continue opening the rest of the capsules, which end up containing experimental gas which transforms them into superhuman monsters.Sunny accidentally killed one of the troupe members younger brother and he escaped the groups wrath.But he also got exposed on the gas and collapses on a smugglers ship heading to Hong Kong.He was thrown overboard when the crew discovered him. ........

Source: Wikipedia