Eric Kaempffer was a sadistic and brutal Waffen-SS major stationed in Romania in 1941. He and his men were dispatched to the Dinu Pass in the Carpathian Mountains in response to messages sent by Captain Klaus Woermann that "something" was murdering his men. He initially thought that the deaths were caused by Romanian partisans opposed to German occupation, but soon grew to entertain the notion of the supernatural after two of his own murdered soldiers came back to life and appeared in his bedroom within the Keep.
He begrudgingly sent for the assistance of Jewish history professor Theodore Cuza after the mysterious killer, a vampire-like individual named Rasalom, wrote a message in an ancient language on the wall in the blood of the SS soldiers. In truth, Kaempffer didn't believe that Cuza, a Jew, could solve his problems, little suspecting Cuza of allying himself secretly with Rasalom. He was later killed by the reanimated corpse of Captain Woermann after Woermann committed suicide by hanging himself. After this, Kaempffer became one of the undead himself and fell under Rasalom's power until Rasalom's death and the Keep's destruction whereupon Kaempffer and the other slain Germans returned to true death.
The Keep (1983 film)
Kaempffer is depicted as being less intelligent and more stubborn, violent and even less willing to accept supernatural explanations, believing until almost the very end that Romanian partisans are responsible for everything. During Molasar's attack against the Germans within the Keep, Kaempffer, seeing Woermann clutching a silver cross given to him by Cuza, shot the other officer in the back and jealously stole it for his own use before attempting to escape. He found all of his and Woermann's men killed and encountered Molasar himself, and tried to hold the monster back with the cross. Molasar simply grabbed it and crushed it in his bare hand, before killing Kaempffer by sucking his lifeforce from his eyes and mouth.