Luisa visits her dying mother at Karlstein Castle. Before she dies, she tells Luisa that the Karlsteins are a family of vampires and that her ancestor, the original Count Karlstein, lies buried in the crypt.
Dracula kills victims. Dr. Seward tries to stop him. Dr. Frankenstein brings Dracula back to life, using his monster. Dracula and a female vampire terrorize the town. Seward is attacked by Frankenstein's monster.
A lawyer finds out that a young couple convicted of murder was in fact framed for the crime and goes to the prison with the hope of freeing them and learns the events that happened to the two from a fellow prisoner who helped them escape.
