Lloyd’s ward, Gayle (Mary Carlisle), becomes engaged to marry the young physician Dr. David Bently (Nedrick Young), on the night that Zolarr exhumes Elwyn’s coffin and he emerges as a vampire ready to seek revenge on his brother. Elwyn displays his vampire powers, only achieved at night, as there’s the mysterious death of a healthy person. He then vows to make Gayle his disciple and puts her in a trance. When Clayton is visited by the ghostly figure of his evil brother, he can’t get David to believe him. David thinks Clayton has turned evil and is responsible for Gayle’s condition. As Gayle lies in a coma and grows weaker every day, the two squabble until a local woman, Kate (Fern Emmett), who is considered by the locals as daffy, suggests all the movie-lore remedies for handling a vampire, like having a crucifix worn by Mary as protection and finding during daylight the body of the vampire and burning it. David is convinced when Elwyn puts in an appearance at Mary’s bedside with him present, but the ignorant locals form a lynching party for Clayton. He escapes their clutches and locates his brother, and the two battle as the house they are in catches fire.