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...
郭富城
as Sunny Li Fei
舒淇
as Angel Chan
吴京
as Sun Hao
张静初
as Cheng Xiuhua
元華
as Uncle Da / Tak
鄒兆龍
as Zhang Dachu
铁男
as Liu Zhenxing
Karen Cheung Bo-Man
as Yao Li
Gao Yan-Chao
as He Jun
So Ming-Hei
as Zhang Tiegen
黃智賢
as Inspector Tong
Gary Chiu Cheun-Sing
as Inspector Chan
