SS death-camp troopers arrive at the keep to find out who—or what—is killing the German soldiers stationed there. But they too fall victim to an evil older and even greater than their own. Desperate, they turn for help to Professor Theodor Cuza, an expert on the keep. But there is irony here: he is a Jew. F. Paul Wilson continues the adaptation of his own novel, aided by the moody art of Hellboy’s Matthew Smith.