Fist of the Vampire (2007)

1977 A family is murdered in cold blood The case goes unsolved for decades and remains a mystery Enter the present day detective Lee Southward is sent on assignment to infiltrate an illegal underground fighting tournament and bring in the organizers Lee battles his way to the top of the tournaments in attempts to get closer to the organizers As Lee draws closer and begins to piece clues together he is brought back to the case closed decades ago However there is a problem The organizers are of the undead and crave human blood Lee must fight his way through all the sex drugs and violence of the underground while trying to piece together evidence with the help of an undercover officer and find a way to stop the undead