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...
Aaron Kwok
as Sunny Li Fei
Shu Qi
as Angel Chan
Wu Jing
as Sun Hao
Zhang Jingchu
as Cheng Xiuhua
Yuen Wah
as Uncle Da / Tak
Collin Chou
as Zhang Dachu
Tie Nan
as Liu Zhenxing
Karen Cheung Bo-Man
as Yao Li
Gao Yan-Chao
as He Jun
So Ming-Hei
as Zhang Tiegen