Katrina is a lovely prostitute that Jack Crow and his gang utlize for recreation in a motel after a succesful raid on a Vampire lair. When a Super Master vampire named Valek wrecks the party he bites Katrina on the neck. She slowly is turning into a vampire as Jack tries to use her to locate the vampire Valek. Katrina bites Montaya when he watches her alone. He keeps this a secret and at the end of the film Montaya and Katrina travel together on the run as they are slowly turning into vampires that Jack Crow will have to hunt down and kill.

Valek is a legendary master vampire. He strives for a dark cross that will enable him to becomes a vampire that can walk during the day as well as the night. He travels the world with a group of master vampires in search of his prize. Valek battles Jack Crow and his crew and kills all of them but Jack and his close friend Montaya who are partying in a motel after a succesful vampire raid. Valek also bites a prostitute named Katrina who becomes a way for Jack Crow to keep up with Valek because vampires share a mental link with those they bite. Valek arranges a great ceremony involving the legendary black cross. The Catholic Cardinal Alba has agreed to bless the dark ceremony in exchange for immortality.

This is a tag along assigned by Cardinal Alba to keep an eye on Jack Crow and his crew. The Father witnesses first hand how the business of killing vampires is anything but pretty or holy. He even dons armor of sorts and fights alongside Jack and his crew.

The Cardinal is the chief religious figure responsible for taking care of the vampire problem of the world for the Catholic Church. The Cardinal uses slayers like Jack Crow and his paid killers to fight the vampire problem. But the Cardinal is getting older and fears death. He strikes a deal with Valek the master vampire in which he agrees to bless a human sacrifice in exchange for immortality.