Directed by Alexandre Aja, "High Tension" (also known as "Haute Tension" or "Switchblade Romance") is a 2003 French slasher film
. Aja, known for his bold and provocative style, co-wrote the screenplay with Gr≈Ωgoire Levasseur
. The film stars CŽline de France and Ma•wenn, and is celebrated for its unflinching violence and intense atmosphere
. Aja's direction has earned him a reputation as a leading figure in the horror genre.

The plot centers on two young women, Marie and Alexia, who travel to Alexia's family's secluded farmhouse to study for exams
. Their peaceful getaway turns into a nightmare when a sadistic killer begins slaughtering Alexia's family and takes Alexia hostage
. Marie must confront the killer and protect her friend, leading to a series of terrifying and brutal encounters
. The film is known for its twist ending and graphic violence, making it a standout in the French Extremity movement
.

"High Tension" received several awards, including Best Director and Best Actress at the Sitges - Catalonian International Film Festival, and the Grand Prize of European Fantasy Film in Silver8
.