Someone's Knocking at the Door

Returning to the same medical school where they were test subjects years before, two twisted serial killers use brutal sex acts to kill off a group of med students. Returning to the same medical school where they were test subjects years before, two twisted serial killers use brutal sex acts to kill off a group of med students. Returning to the same medical school where they were test subjects years before, two twisted serial killers use brutal sex acts to kill off a group of med students. Returning to the same medical school where they were test subjects years before, two twisted serial killers use brutal sex acts to kill off a group of med students.