[2] After the three law students Thomas, Yann and Vincent have passed their tests, it says "party time".

Along the way they meet at a gas station acting suspiciously leaving the hitch-hiker Sébastien, whom they take in spite of the news story about a psychopath who had escaped.

Just when this begins to show his nasty side, they got into an unnaturally dense mist coming off the road and plunging into a deep ravine.

The fatal crash is however hampered by the thick branches of fir trees, so that the four men arrive, although injured, some seriously, but still alive on the ground.

No reception for mobile phones, the next village several kilometers away, a mortally wounded friend, and probably a psychopathic killer in their group.