1977. A family is murdered in cold blood. The case remains unsolved for decades and remains a mystery. Enter the present day, Detective Lee Southward has sent a mission to infiltrate an illegal underground fighting tournament and bring in the organizers. Lee fights his way to the top of the tournaments in an attempt to get closer to the organizers. As Lee gets closer and begins to piece together clues, he returns to the case that was 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 underground sex, drugs and violence as he tries to gather evidence with the help of an undercover officer and find a way to stop the undead.