After taking a shortcut through a dense, dark forest to return home, unsuspecting Rosalee has a fatal encounter and vanishes into thin air. And it seems that the finger of suspicion is pointed at Professor Roger Osborne, a reclusive, self-absorbed authority on molecular biology. Indeed, people say he's performing illegal experiments on animals and even women. However, the truth is far more terrifying. Now, a deranged, blood-thirsty member of an underground group of occultists is on the prowl for his next victim. Who can stop the maniac killer?