"Tense direction… builds steadily in suspense!" – Variety

The patients are sick… but the doctor is a real sicko! When a small-town physician (John Beal) accidentally swallows experimental bat serum pills, he's soon up to his Hippocratic Oath in blood-thirsty desire! Transformed into an undead fiend, the doctor finds himself sucked into a dark and sinister world – where he must save patients by day… and suck their blood by night!