Bloody Pleasure (aka Placer sangriento)

A masked maniac prowls the beaches of Argentina. He captures beautiful girls, takes them back to his lair, and injects them with dope. This is when things get very weird. He then plays some freaky-sounding organ music to turn them into his zombie slaves. We won't tell you what he does to them, but it isn't pretty. There are some cringe-worthy moments involving hypodermic needles and there are numerous shock scenes.