The Changer (Nostril Picker)

A social outcast named Joe learns a supernatural chant that allows him to change his physical form. He transforms into 'Jo,' a teenage girl, to infiltrate a group of high school friends. He then proceeds to lure them into isolation one by one, murdering them in a gruesome fashion that includes cannibalism. A detective, whose daughter is in the friend group, races to uncover the bizarre truth behind the slayings before the killer, who can be anyone, strikes again.