- HD 1080
- Runtime: 107m.
- Status: Released
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- Languages: cn
- Country: Hong Kong
- Director: Dante Lam Chiu-Yin
- Stars: Edison Chen, Charlene Choi Cheuk-Yin, Gillian Chung, Ekin Cheng Yee-Kin, Jackie Chan
- keywords: martial arts
- Production_studio: Emperor Multimedia Group, Million Channel Ltd., Goldpeak
- Slogan: A new age of darkness is dawning.
- The The Twins Effect is featured in the top rankings of 2003
- #64 in Top Action Movies of 2003
- #19 in Top Horror Movies of 2003
An evil Duke attempts to kill and collect the blood of a royal family of European vampires in order to become all powerful. The only surviving member of the family travels to Hong Kong, only to complicate his struggle by falling in love with a mortal girl who just happens to have a vampire hunter for a brother.
