Séquelles (2014)

Deborah and Simon park their car to go hug in the forest. They get knocked out and wake up in a house where four dangerous psychopaths spend their time humiliating and killing innocent people. Attached, chained, they have no chance of escaping. They will live - with other young people, for they are not alone - what they would like to be a nightmare. There are well-kept secrets. Few people know them. It's something powerful. He protects these four bloody maniacs.