| english title | The Twins Effect |
| original title | 千機變 |
| aka | Vampires Effect |
| year | 2003 |
| country | Hong-Kong |
| genres | action comedy romance |
| duration | 1h47 |
| production studio | EMG |
| classification | Hong-Kong:  |
It's said which vampire absorbs all six Vampire Princes' blood opens the dark bible "Day For Night", it can control the human world. Ace Vampire slayer Reeve and his new partner Gipsy are on this mission, however Reeve's younger sister Helen falls in love with the fifth prince Kazaf, who is a gentle vampire that never hurt human. One day, The Duke leads thousands of vampires to kill Reeve and to absorb Kazaf's blood, the last one on his killing list. While the Duke is about to open the "Day For Night", Helen and Gipsy arrive the church and fight against The Duke...
(source: DVD)
