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