In 1661, a man stands accused of being a committing numerous evil deeds and practicing witchcraft. He sits chained and bound, surrounded by hooded figures, as the charges against him are read. He sits and listens to the charges in silence and then laughs maniacally as the makes his chains disappear with his magic.
While being burned at the stake, Vitelius delivers a threatening and longwinded speech, swearing to return and kill the ancestors of the ones who are responsible for his death. This is to happen when the comet, which just happened to be passing overhead, returns in the future..
We now leap forward in time to 1961. Astronomer Ronald and his astronomer fiancee, Victoria, discuss the soon to be appearing comet with the professor. They see the comet briefly and then a light falls off of it and crashes to the ground. The couple take off to investigate.
A man, who just happened to be parked near the vicinity of the crash, leaves his car to investigate what he has just witnessed. Imagine his sheer terror as "The Braniac" inhales the contents of his skull. After feeding, the horrible creature becomes our old friend Vitelius.
Ronald and Victoria, out comet-watching, run into a mysterious stranger in the woods. Finding out he knows quite a bit about astronomy, they invite him to swing by the observatory some time, and head their separate ways. Vitelius heads for a bar, where he meets a woman and promptly sucks her brains.
Local authorities and scientists are baffled by the marks on the back of the victims heads. They conclude that the killer has a strong surgical background. Meanwhile, Baron Vitelius, new to the area, holds a party and invites all of the last ancestors of those who burned him alive three hundred years earlier. We are treated to a five minute long sequence of each person coming through the door. Each stops and as the butler reads their names, the guests faces are replaced momentarily by the faces of the inquisitors.
One of the men and his daughter find a an old book that referred to a man named Vitelius. The baron becomes enraged when hearing this. He freezes them both with an evil stare and then sucks both of their brains. Of course the authorities have no clue as to what is really behind the rising body count.
Vitelius tells Victoria of his immense love for her. He then tells the whole inquisition story and informs Victoria that she, unfortunately must die. He turns into the Braniac again, Victoria screams and runs into the arms of Ronald. What an unfortunate situation! Will our protagonists survive? Watch the movie!