"Carmilla" is a gothic novel that tells the story of Laura, a young woman who lives isolated with her father in a countryside mansion. One day, a mysterious young woman named Carmilla arrives at their home after an accident. As they get to know each other, Laura feels a growing attraction toward Carmilla, who begins to display strange and unsettling behaviors. The strange occurrences in the mansion seem to be connected to the enigmatic guest.

Soon, Laura discovers that Carmilla is a vampire who feeds on her vitality, unleashing a series of terrifying events. Through this chilling tale, J. Sheridan Le Fanu explores themes of desire, passion, and death, creating an atmosphere of horror and mystery. "Carmilla" is one of the earliest works that influenced modern vampire literature.