Watch I Am the Ripper

This French horror movie uses a documentary style that makes the battle that occurs over the life of a girl, Raphaelle who is attending a party. After a number of the attendees of the party are murdered by a hooded figure, the remaining few run for safety, but find they are unable to find a way out of the apartment. After Raphaelle is transformed into a demon, members of the party are given 24 hours to prepare to battle for their futures.