Ishmael, the son of Hagar, an old hag, living on the edge of the desert, falls completely under the charms of Lispeth, a vampire. One day there passes the miserable hut in which these three strange people live, a wealthy banker, named William Corday, his wife and son. Derrick. Lispeth wields her magic power over the husband and soon has him in her power. When he attempts to kiss her, she repulses him. So clever is she that the wife has no idea of her husband's unfaithfulness. Acceding to the wishes of Lispeth to be taken away from her humble abode, the banker and his wife take her to the city and give her a home with them. In fashionable dress her fascinating powers seem doubled, and one day in his study the husband beseeches Lispeth to flee with him. This is overheard by the son, who denounces his father. In order that the son should not tell his mother, Lispeth assures him that it was with him whom his father wanted her to flee. The son, believing this, embraces Lispeth, but is thrown aside by the angry father. Then Lispeth tells the father that she had to win the son over in order that he should not tell his mother. Lispeth continues her play with the father and son; but at length arranges to elope with the old man. Just as they are leaving the house, Lispeth is interrupted by the son. Father and son are facing an awkward situation, when Ishmael arrives and takes Lispeth back home. In a maniacal burst of fury, Ishmael takes her life.