Son of Dracula

Count Alucard, a mysterious stranger, arrives in the United States at the invitation of Catherine Caldwell, one of the daughters of a New Orleans colonel, owner of the Caldwell plantation. Shortly after his arrival, the colonel dies and leaves his wealth to his two daughters: Claire gets all the money, and Catherine gets the Dark Oaks plantation. Catherine secretly marries Alucard, avoiding her longtime friend Frank Stanley. Frank tries to stop the couple and shoots Alucard, but the bullets pass through the count's body without harming him, and hit Catherine.

Shocked, Frank runs to Professor Brewster and tells him everything. The professor arrives at the Dark Oaks and meets Alucard and the living Catherine there. The couple tells him that from now on they will devote their days to scientific research, and receive guests only at night. Frank comes to the police and confesses to Katherine's murder. Brewster, who saw Catherine alive, tries to convince the sheriff that she will be busy all day, but he insists on an immediate trip to the Dark Oaks. He finds Catherine's dead body in the crypt and brings it to the morgue.

Meanwhile, Hungarian Professor Lazlo arrives at Brewster's house. Dr. Brewster notices that the word "Alucard" reads backwards as "Dracula", and realizes that he is a vampire. Later, a local woman brings her son to the professor, bitten in the neck, and this confirms Lazlo's guesses. Later, the count himself comes to Brewster and Lazlo, but they drive him away with the help of a cross.

Catherine, who has become a vampire, enters Frank's cell and explains that she still loves him and married Alucard in order to achieve immortality, but she wants to share eternity with him. Frank doesn't agree at first, but then gives in to her. Catherine tells him how to destroy Alucard. Frank escapes from prison and searches for the secret place where Alucard's coffin is located; it is located in a cave in the swamps, and it is there that the count hides from the sun's rays. Frank burns the vampire's coffin. The count has nowhere to hide from the sun's rays, and he dies. Brewster, Lazlo and the sheriff find the place where Alucard slept during the day, and discover only his skeleton. Then they go to the Dark Oaks, where they find out that Frank also set Catherine on fire and thereby destroyed her.