Dr. Carruthers (Bela Lugosi) is a well respected citizen of the town of Heathville and has made the town’s premiere family, the Heaths, very wealthy from the formulas he has created for their cosmetics company. Unfortunately for him, he took a flat fee for his work rather than an investment in the firm, which would have made him very wealthy. A bitter resentment fuels his creative passions now, and a new strongly scented aftershave lotion he has created is his means for revenge. Unbeknownst to the family, he has created a large killer bat which hones in on the scent to kill whoever bears it. One by one, Dr. Carruthers kills the family members. He tricks them into “testing” the new lotion on the tender part of their neck… exactly where the bat’s bite will be most deadly!