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...

• Shanxi Film Studio
• Enlight Pictures
• Aaron Kwok
• Shu Qi
• Wu Jing
• Zhang Jingchu
• Yuen Wah
• Collin Chou
• Tie Nan
• Karen Cheung Bo-Man