After Annika, a medical doctor, gets work at the local hospital, she and her 17-year old daughter Saga move to a small town in northern Sweden. Annika is keen to work with her idol, geneticist Professor Gerhard Beckert. However Beckert's sinister past in the Waffen-SS soon catches up with him when a couple of pill-popping interns mistake an experimental vaccine for party drugs. Mayhem ensues as the town's teenagers succumb one by one to the mysterious virus.