Police detective Michael Colefield has his normal life thrown into disarray when he finds out that his best friend has disappeared the night before his wedding, and may be a corrupt cop. The plot thickens when DS Colefield is visited by two members from a secretive group posing as internal affairs.
Investigating a suspicious hit-and-run by a limousine with blacked-out windows, the squad suspects that the sunlight-shy son of a well-known businessman is a vampire and decides to investigate his financial activities.
The squad members investigate the attempted rape of a female barrister who was apparently saved by a vampire. They find that she has been desperately trying to have a child, and has been been impregnated in-vitro with her late husband's sperm, but the pregnancy is not normal. Meanwhile, Jack has disappeared without trace and Kirsty tries to get Jacob, a journalist, interested in investigating his disappearance.
After a boy kills a priest, the squad discovers vampirism among the schoolboys, even though none of them appear to have been bitten.
The squad becomes interested in a shipment of mysterious crates of medical supplies from Brazil.
The captive vampire is identified and the squad discovers a vampire plan to exterminate mankind. Meanwhile, Michael searches for Kirsty, who seems to have been abducted.
In 2000, the Fox Network in the United States developed an ongoing series version of "Ultraviolet" starring Eric Thal, Joanna Going and Mädchen Amick, with Idris Elba reprising his role from the British series. However, the American version did not progress beyond an unaired pilot episode.
