Children of the Vampire King

The graveyard shift at the Night and Day truck stop used to be quiet and uneventful, until a group of attractive drifters show up one evening. But these are no ordinary customers. As the body count rises, the staff soon realize that if they don’t soon put a stop to the antics of this group of sadistic killers, they will feature as the main course on the vampires' menu. The question is: How?