John Carpenter's Tales of Science Fiction: Hell #2

Born in the Underneath... trapped in the Overworld... the calm, inhuman visitor known as Kartkas is charged with helping a human team visit and explore his stomping grounds... the regions beneath... commonly known throughout history as Hell. Their journey only starts in the Bermuda Triangle, aboard a ghost ship - a haunted tanker. Beneath that, a violent steam tunnel breaching the Atlantic Ocean floor. And beneath that ...?