A string of brutal murders grips the University of Perugia, each victim claimed by a distinctive red-and-black scarf. Seeking refuge, four young women escape to an isolated countryside villa—only to discover the killer has followed them into their sanctuary. Directed by Sergio Martino and featuring Suzy Kendall, Tina Aumount, and Luc Merenda, this 1973 giallo masterpiece builds tension with every frame.