Sunny is the orphaned child of a former knife throwing master. Following his father's death, he is taken in by his uncle, who allows him to perform as a clown in a circus, since he did not inherit his father's knife throwing skills. Sunny still wants to be a knife thrower, though. He is tormented by his cousins, who are all performers in his uncle's troupe. Many years ago, somewhere in Malaysia, when the Japanese are experimenting on some gases that mutate people, their lab explodes, killing everyone inside. One day, Sunny overhears a plan the rest of the troupe are 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, releasing the experimental gas which transforms them into superhuman monsters. In the chaos, Sunny accidentally kills one of the troupe member's younger brother and he manages to escape the group's wrath. But he also gets exposed to the gas and collapses on a smuggler's ship heading to Hong Kong. He was thrown overboard when the crew discovered him. A few days later, Angel, a reporter discovers him in his fat form after waking up from his coma. He was driven to a safe house somewhere. While sleeping, Sunny drains his fat and excess water. He later wakes up in his normal form, but finds out that he now possesses superhuman strength and heightened abilities. He tries to contact his uncle, but gets shocked when he finds out that his uncle was arrested by the Malaysian police for the incident while he was interrupted by incessant mosquitoes flying to him. Meanwhile, several armored cars, banks and jewelry shops worth millions of dollars were blown and stolen by unidentified persons and several medical experts were abducted as well. A mutant couple disguised as detectives decide to investigate the matter. Angel was fired on her own program for a newer one. While she's walking, she witnesses a hostage drama. Sunny also saw the scene and uses a stick to disarm the hostage taker. He becomes an instant hero, but he blows his cover to his mutated former troupe members. He also became an instant star and endorser when he was interviewed by Angel herself. The troupe attempts to kill him for his blood, knowing that it now contains the antidote for the virus. The attack is repelled and one mutated member gets killed, but this exposes Sunny's weakness to cold. The mutant detective couple decide to become Sunny's bodyguards. In one commercial shoot, he gets attacked by the troupe again, nearly killing Sunny and Angel, during which another member later burns to death. Sunny recovers while he is away and trains under the detective for the inevitable showdown between the two.
Cast
Aaron Kwok as Sunny, an ordinary circus clown who was accidentally exposed to chemical gas turns into a mutant with superhuman abilities.
