Two girls pick up a crazed hitchhiker who may or may not be the serial killer murdering hippies in the area. Two girls pick up a crazed hitchhiker who may or may not be the serial killer murdering hippies in the area. Two girls pick up a crazed hitchhiker who may or may not be the serial killer murdering hippies in the area. Two girls pick up a crazed hitchhiker who may or may not be the serial killer murdering hippies in the area.