A doctor accidentally takes some pills that turn him into a vampiric predator.
Personally, I don't particularly find the concept of taking a traditional monster and trying to turn him into a science fiction monster to be necessarily interesting, so I didn't really go into this movie expecting much. However, I ended up really liking this movie; I think it's very effective, largely because it fleshes out and differentiates the various interesting characters, and the whole thing is quite well acted. In particular, John Beal (in the title role) really projects a sense of the horror of his situation and his desire not to hurt the ones he loves. This compensates a lot for the fact that the monster make-up is pretty lame; fortunately, you really don't see much of it. The movie doesn't have much of a reputation; it's sitting with a 4.1 rating on IMDB, but I thoroughly enjoyed it.