InPerugia,aserial-killerisstranglingcollegestudents.InspectorMartinoisinchargeoftheinvestigationandhasablackandredscarfastheonlyleadtobefollowed.HeasksthescarfstreetvendorGianniTomassoifherecallswhomighthaveboughtthescarf,butthemantellsthathecannotremember.ThenGianniblackmailsthekillerandbecomeshisnextvictim.MeanwhilethecollegestudentsandgirlfriendsJane,Daniela,KatiaandUrsulatraveltoanisolatedvillatospendacoupleofdaystogetherduringabreakfromthearthistoryclassesoftheirprofessorFranzthathasbefriendedJane.WhenJanetwistsherankle,Dr.Robertoissummonedandaskshertorest.ThestudentStefanoVanzistalksDanielasinceheisobsessedforher.Arethegirlsindangerinthevilla?Whomightbethekiller?
