I personally wouldn't go as far to say that Vampire Bats is a great movie, however, I don't think it is a bad movie either. If you are looking for a well done movie, look no further. This film was made for Halloween. They didn't have the big budget, but it was well written and acted. The appealing elements of this movie more than make up for an unremarkable story.
In Louisiana, three freshmen friends of the Tate University go to an underground party in the woods nearby the local cemetery. They drink the punch spiced with ecstasy and are completely drugged. One of them is attacked and killed by violent bats. When the police finds the body, they arrest the others as prime suspects. However, their biology professor sees the corpse and advises that the youngster had been actually bitten by animals. When the professor catches bats using a goat and a net, she realizes that the animals are mutant vampire bats with extra fangs and that the modification of the breed was caused by the water dumped in the river. While a group seeks the lair of the bats and a means to eliminate them, she discloses corruption in the town.
