Tom is a Former United States Marine who works for Hellsing Security Solutions, a Private Military Company specializing in hunting vampires.  After a raid on one of the most influential covens in the United States goes wrong, he is targeted by the patriarch of the coven he once hunted.  Together with Lorna, the heir to the Ardelean throne, he must work to dismantle a plot that has much higher stakes than anything a simple Marine is trained to handle.