One Way Trip

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 doesn't come back. His buddies find him facedown in a puddle with his head smashed in. They don't know what happened but need to find help, and fast. As they discover that their car has a flat tire and their phones don't work, they seek shelter in a nearby farmhouse. But the farmhouse turns out to be the last place they want to be.... (official distributor synopsis)