Like I'm thinking a late 60's - early 70's hippie festival, some people make new friends, he offers this group a place to stay (it begins to rain). He brings them to a remote cabin and soon members begin dissapearing one by one. He manipulates the remaining ones with reasonable excuses, until there's only one girl left. He starts chasing her (nothing to hide anymore), we get to see the cabin in full during the chase, she finds the bodies (all murdered + hidden in different ways). He chases her up the stairs and locks them in a bedroom, takes her, she cries and as he finishes we think he might save her - but he goes for the full deal and drains her of blood as well. The end!