English
During a night at the opera, Estelle Henderson is embarrassed by her drunken fiance, John, but also attracted by a dark and mysterious young man in the audience. After the performance, John attacks Estelle's father, Dr. George Henderson, but is stopped by the young man, who introduces himself as Alex Stone. Alex and Estelle go out for dinner and fall in love.
As it turns out, Alex is part of a vampire coven. Questioned by his fellow vampires, he reveals that he his tired of the emptiness of being a savage beast living in eternal darkness. Seeking help from Estelle's father, a famous medical research scientist, Alex confides in Estelle, explaining that he is a vampire but would prefer a mortal life with her. When approached, Dr. Henderson is incredulous at first but then is very interested in working with a vampire as this could further his research into immortality.
However, Henderson's research is funded by Victor Price, head of the Illuminati, a multi-national crime syndicate, who hope to attain immortality through that research. Meanwhile, they are harvesting people for spare body parts. Through an informer, Price learns of Alex's case and allows Henderson's research to continue if Alex would in turn make him a vampire. Though Dr. Henderson unlocks the secret behind Alex's vampirism, Alex refuses to provide Price with immortality. He informs the Hendersons of Price's association with the Iluminati but then agrees to Estelle's enigmatic suggestion to "take advantage" of the Iluminati's power.
Meanwhile, Alex's fellow vampires are lacking Alex's power to make the group disappear, have to contend with Marshall Pope, a vampire hunter working for Interpol who has been brought after the police discovered the existence of vampire attacks. With his help, the police manage to kill the other vampires, who are lacking Alex's power, though Pope is also killed. The police have also arrested one of Price's henchmen, Rex, in a failed drug trafficking operation. In a bargain, Rex reveals Price's role in the operation, prompting the police to put Price under surveillance.
At the same time, Price and his associates receive the promised treatment and return to their mansion, taking Estelle with them. One of Price's henchman, Steven Mills, tries to stake Alex but is overpowered. Henderson and Alex rush to the mansion, where Price is showing all his power and wealth to Estelle in order to seduce her. Alex confronts Price and, as the police storm in, uses his powers of disappearance to vanish together with the Iluminati-turned-vampires. As the bystanders are looking on in bewilderment, the film shows Alex leaving the Iluminati to spend their eternal lifer in outer space, as he returns to earth.
Over a year later, a news reporter notes the Hendersons' acquittal in the Iluminati trial, the unexplained disappearance of the Illuminati and their money, a rapid drop in crime and the absence of further sightings of vampires. The final scenes reveal that Estelle has pilfered the Illuminati accounts and donated the money to a charitable cause and now lives with non-vampiric Alex in a large house.