Irel Clark, a professor's assistant, has made a groundbreaking discovery that is highly coveted in his field - the actual Holy Grail! However, he soon realizes that there are malevolent forces also pursuing the blood of Christ. To save his own life, Irel has no choice but to drink from the chrism vessel he found. Though he gains immortality, he soon realizes that being undead isn't as great as it seems. The world is crawling with flesh-hungry cannibals, and Irel's newly eternal body is like an endless feast for these monsters.