Discopathe

"Discopath" (2013) is a Canadian slasher film about Duane Lewis, a New Yorker who transforms into a serial killer after being exposed to disco music. After murdering a woman in a club, Duane travels to Montreal, where he continues his killing spree. There, he poses as Martin, an audio-visual tech at a private school for teenage girls, where two students hide out for a secret disco party with disastrous consequences.