Vanguard (2009)

John thought he had left the better part of insanity back in the Balkans- but when a distressed stranger entrusts him with an enigmatic device he is thrust once again into a maelstrom of horror and despair. Working with the opaque Jerry whose grim humor hides a dark secret, John must untangle a chilling web of terror that stretches from secret underground catacombs echoing with the screams of life without soul, into the farthest reaches of time and space where a seemingly malevolent force threatens all of existence.