Eight teenagers decide to take a camping vacation to the Swiss hill country. It’s autumn and high season for a powerful, rare magic mushroom that grows there – the main motivation for their trip. They arrive at a secluded location deep in the woods, the mushrooms are collected, and once darkness falls, the party starts. Everyone is having fun until one of the friends heads to grab a beer… and comes back with a blood-covered, smashed-in face. They don’t know what happened but need to find help. As a heavy storm sets in they seek shelter in a nearby farmhouse. But this turns out to be the last place they want to be…